Technical Library

Recent Entries in Technical Library

• Why are PromoCell products “for in vitro research use only”?

  The basis for the intended use of our products is defined in our Terms & Conditions under the chapter “Use of Goods”.

   

• How long do I need to activate my macrophages? Can I stop adding activation factors after 24 hours?

  The activation of macrophages as such is complete after 24 hrs. However, to maintain the activation status over a longer period of time (i.e., several days), fresh activation factors should be added with every medium change.

  Related Links and Documents

  • Application Note: Assay-ready adherent cultures of fully functional human primary macrophages
  • Macrophage Cell Culture
• Once thawed and opened, does Aquaguard-1 need to be refrigerated or can it stay at room temperature? Can I pre-dilute it in water and leave it at room temperature?
  1. We recommend storing Aquaguard-1 at 4°C after thawing. At this temperature it is stable for up to one month. For long-term storage, we recommend a storage temperature of -20°C. Aquaguard-1 can be frozen and thawed up to 5 times without any problems.
     It is also stable for some time at room temperature, but we do not have sufficient data to guarantee a specific time period and therefore do not recommend this.
  2. As mentioned above, we cannot guarantee exactly how long Aquaguard-1 will be stable at room temperature, and therefore do not recommend it. Also, it would be important to store it in the dark, as constant sunlight/UV light will affect its stability.

  Related Links and Documents

  • Aquaguard-1 (incubator)
• Can the matrix in the Angiogenesis Assay Kit (PK-CA577-K905) be left at RT?

  The matrix should always be kept on ice and multiple freeze/thaw should be avoided.

  Related Links and Documents

  • Angiogenesis Assay Kit
• Can the Cytokine Mix E for the Hematopoietic Progenitor Expansion Medium XF (C-39891; 5 ml) be safely aliquoted?

  Yes, it is possible to aliquot the 5 ml Cytokine Mix E (C-39891) into 5 x 1 ml.

  Related Links and Documents

  • Cytokine Mix E
• What is the difference between PromoCell NHEK and NHEK GM3?

  The NHEK (primary human keratinocytes) are isolated in our serum-free Keratinocyte Growth Medium 2 (C-20011), the NHEK GM3 in our improved serum-free and BPE-free Keratinocyte Growth Medium 3 (C-20021). Both, NHEK and NHEK GM3 are available from single or from pooled donors isolated from the epidermis of juvenile foreskin or adult skin.

  Related Links and Documents

  • NHEK
  • NHEK GM3
• Will my NHEK (isolated in PromoCell Keratinocyte Growth Medium 2) grow in PromoCell Keratinocyte Growth Medium 3?

  Yes, the NHEK-GM2 (C-12001, C-12003, C-12005, C-12006) also grow in PromoCell Keratinocyte Growth Medium 3 (C-20021). Using the protocol with the fixed intervals, they grow slightly faster than in Keratinocyte GM2 and proliferate for > 15 PDs.
  Conversely, NHEK-GM3 (C-12011, C-12013, C-12015, C-12016) also grow in the existing Keratinocyte Growth Medium 2 (C-20011). When using the classical subcultivation protocol (density > 70% – 90%), they grow slightly slower compared to Keratinocyte GM3, but also reach > 15 PDs.

  Related Links and Documents

  • Keratinocyte Cell Culture
• Will the NHEM.f (C-12400) and NHEM.f M2 (C-12402) also grow in PromoCell Melanocyte Growth Medium M3?

  Yes, NHEM.f and NHEM.f M2 also grow in our optimized Melanocyte Growth Medium M3 (C24310) and can achieve > 15 population doublings.

  Related Links and Documents

  • Melanocyte Cell Culture
• I have a question regarding your Alanine Aminotransferase Activity Kit (PK-CA577-K752). What is the activity of the ALT Positive Control?

  The activity of the positive control is not determined. However, we can give you the OD value for the positive control from a specific lot. Please feel free to contact and share with us the lot number if you would like to see the expected OD value.

  Related Links and Documents

  • Alanine Aminotransferase (ALT/SGPT) Activity Assay Kit
• Which human AB serum does PromoCell recommend to generate M0 macrophages?

  We recommend to use Human Serum AB „off-the-clot”.

  Related Links and Documents

  • Macrophage Base Medium DXF
  • Application Note: Convenient large-scale differentiation
• I would like to differentiate hMSC into bone cells and further maintain the cells in culture after differentiation. Which medium should I use?

  Osteogenic differentiation of hMSCs with PromoCell MSC Osteogenic Differentiation Medium takes ∼12-14 days (please view the respective Application Note for a detailed protocol). Use fibronectin-coated plates and change the medium every third day.

  The bone cells tend to detach from the plastic after approximately 2 weeks, when differentiation is complete. Therefore, the tests should be performed promptly and the cells should be maintained in MSC Osteogenic Differentiation Medium until then.

  Related Links and Documents

  • Application Note: Osteogenic Differentiation and Analysis of MSC
  • human Mesenchymal Stem Cells
  • Mesenchymal Stem Cell Osteogenic Differentiation Medium
• I am performing MSC chondrogenic, adipogenic, and osteogenic differentiation and am staining the cells. The protocol says to use Saccomanno Fixation Solution. Is there an alternative method to fix the cells because I don’t have Saccomanno Fixation Solution?

  Yes, you can use 4.5% neutral buffered formalin. Paraformaldehyde should work as well.

   

  Related Links and Documents

  • Mesenchymal Stem Cell Culture
• Is PromoCell’s Cryo-SFM produced under GMP standard?

  No, our Freezing Medium Cryo-SFM (C-29910) is not produced under GMP Standard. It is for in vitro research use only and not appoved for diagnostic or therapeutic procedures.

  Related Links and Documents

  • Freezing Medium Cryo-SFM
• Is it possible to differentiate M1 macrophages from PBMC in 96-well plates?

  At PromoCell, we have not tested macrophage differentiation from PBMC in 96-well plates, but we know from users that it is possible.

  According to a customer the mononuclear cells differentiate very well in the 96-well format. A plating density of 1 million PBMCs (without prior determination of monocyte content) per well has been shown to be optimal. The working volume in a 96-well plate is usually 100 µl.

  Related Links and Documents

  • M1-Macrophage Generation Medium DXF
• Can the medium for M2 macrophages be switched into RPMI or RPMI + M-CSF after differentiation?

  Unfortunately, we did not test this in our hands, and it must be tested by the customer. In fact, our medium is completely different from RPMI and therefore we cannot predict if this is working. We only know the successful long-term culture from our system with our media.

  Related Links and Documents

  • M2-Macrophage Generation Medium DXF
• Why does the macrophage differentiation in the PromoCell protocol take 10 days? In the literature or following the feedback from other researchers, it usually only takes 7 days.

  M1 / M2 polarization also takes seven days in the PromoCell system but the protocol contains two more days for optional macrophage activation. If you only want non-activated M1 / M2 macrophages, the process is usually completed after 7 days.
  Nevertheless, PromoCell does not recommend shortening the 10-day protocol because you actually get a plus in viability and cell yield (due to the re-attachment of floating cells) on day 8-10 due to the media change.

  Related Links and Documents

  • Application Note: Differentiation of M1- or M2-Macrophages
  • M1-Macrophage Generation Medium DXF
  • M2-Macrophage Generation Medium DXF
• I differentiated M1 macrophages from self-sourced PBMCs following your differentiating protocol. In the final cell culture, I can see small cells attached to the macrophages which are CD3+ (T-cells). What is the reason for the T-cell contamination after the differentiation?

  The reason for the higher number of lymphocytes in the macrophage culture is probably due to an insufficient washing step during the purification of the monocyte via adherence. The 3 washing steps in our protocol are essential to receive a monocyte population of over 90%.

  Related Links and Documents

  • Application Note
  • M1-Macrophage Generation Medium DXF
• How long do I have to activate the cryopreserved macrophages to measure cytokine release?

  In general, we recommend activating the cells for 24 hours or at least over night for all kind of activations. If the activation is not optimal in your experimental setting, you can increase or decrease the activation time accordingly.

   

  Related Links and Documents

  • Application Note
  • Macrophage Cell Culture
• I would like to analyze the macrophages by microscope and I would therefore have to plate the cells on fibronectin-coated glass. Did you test if the macrophages grow on fibronectin-coated glass?

  We did not test if the macrophages attach on fibronectin-coated glass.

  Related Links and Documents

  • Macrophage Cell Culture
• Following the recommended seeding density for your M1 macrophages (100,000 cells per cm2), I would need too many cells to have a complete 96- or 384-well plate. This is too expensive for me, can I reduce the number of cells per cm2?

  The recommended seeding density with 100,000 cells per cm² is needed for a confluent cell layer as the cells do not proliferate.
  However, you can reduce the seeding density by the factor 3 to 5 and the macrophages are still viable.

  Related Links and Documents

  • Macrophage Cell Culture
• Do you recommend a certain negative control for the activated macrophages to compare the cytokine release with?

  Even non-activated macrophages do release a certain amount of cytokines. Furthermore, you would have to be sure that the release of a certain cytokine is a direct consequence of the activation. Therefore, we do not think it is possible to have a general negative control for the cytokine release.

  Related Links and Documents

  • Macrophage Cell Culture
• Does PromoCell have any data regarding the cytokine profile and different markers of the M1/M2 macrophages after activation?

  No, we do not provide data about the cytokine profile of our M1/M2 macrophages after activation and we do not provide any further data beyond the scope of our quality control.

  Related Links and Documents

  • Macrophage Cell Culture
• Which cytokine concentrations does PromoCell recommend for activating M1/M2 macrophages?

  You may find all information regarding the activation and the cytokine concentrations in table 1 (page 5) of our Application Note.

  Related Links and Documents

  • Application Note
  • Macrophage Cell Culture
• Did PromoCell try plating the cryo-macrophages in 96-well plates?

  We did not plate the cryo-macrophages in 96-well plates. However, we heard from other customers that they have successfully used our macrophages in this kind of plate.

  Related Links and Documents

  • Macrophage Cell Culture
• I received 3 DetachKits yesterday. Some of the tubes have different colors, although they all come from the same batch.

  The components of the PromoCell DetachKit may occasionally arrive with a non-uniform color appearance. This phenomenon is known to PromoCell’s Quality Assurance Dept.
  It is reversible and has no influence on the quality of the product.

  Related Links and Documents

  • PromoCello DetachKit
• Are endothelial cells α-SMA-negative under all circumstances?

  Scientific findings from different groups, as well as our own results indicate that the presence or absence of α-SMA is not a valid indicator for the composition of a given cell population. Research findings and our inhouse data suggest that endothelial cells are not α-SMA-negative under all circumstances. α-SMA negativity is not an intrinsic property of endothelial cells but can vary depending on extrinsic influences.

  Lot-specific values for α-SMA in our Certificates of Analysis (CoAs) are therefore not considered meaningful.

  Related Links and Documents

  • Endothelial Cell Culture
  • Ando et al.; Am J Physio l. 1999 May;276(5):H1755-68
  • Lu et al.; Stem Cells Dev . 2004 Oct;13(5):521-7
  • Azuma et al.; Biochem Biophys Res Commun . 2009 Mar 13;380(3):620-6
  • Frid et al.; Circ Res . 2002 Jun 14;90(11):1189-96
  • Kovacic et al.; J Am Coll Cardiol . 2019 Jan 22;73(2):190-209
  • Jones et al.; Am J Respir Cell Mol Biol . 1999 Apr;20(4):582-94
  • Ma et al.; Front Cell Dev Biol . 2020 Apr 21;8:260
  • Kocher and Madri; In Vitro Cell Dev Biol . 1989 May;25(5):424-34
  • Amberger et al.; FEBS Lett . 1991 Aug 5;287(1-2):223-5
• Is vWF a great marker for Endothelial Cells?

  Secretory granules called Weibel-Palade bodies (WPBs) containing Von Willebrand factor (vWF) are more linked to the formation of a confluent endothelial monolayer. Research shows that vWF expression is dynamic and highly dependent on the cell culture conditions such as confluence and passage number.
  Therefore, having vWF as a quality control marker for each lot of ECs is not really necessary.

  Related Links and Documents

  • Endothelial Cell Culture
  • Howell et al.; Mol Membr Biol. Nov-Dec 2004;21(6):413-21
• The components of my DetachKit show different colors. Is this normal or does it affect their quality?

  The components of the PromoCell DetachKit may arrive on occasion with a non-uniform color appearance. This phenomenon is known by PromoCell’s Quality Assurance. It is reversible and does not influence the quality of the product.

  Related Links and Documents

  • PromoCell DetachKit
  • PromoCell DetachKit 2
• Can I defrost Accutase Solution, prepare aliquots and refreeze them?

  Yes, Accutase Solution can be defrosted, aliquoted, and then refrozen.

  Defrosting: Accutase should be defrosted overnight in the refrigerator or placed in a tub of cold tap water.  Do not defrost in a 37°C water bath.
  Stability: Once thawed, it is stable for at least 2 months in the refrigerator if stored promptly after use.

  Related Links and Documents

  • Accutase Solution
• Is it possible to refreeze the hCD34 progenitor cells after having amplifed them in PromoCell Hemaotopoietic Progenitor Cell Expansion Medium XF?

  Yes, it is possible to refreeze them.

  Related Links and Documents

  • CD34+ Progenitor Cells
  • HPC Expansion Medium XF
• Why are the cryopreserved macrophages abbreviated as hMDM-GMCSF(-) and hMDM-MCSF(-), respectively? What does the (-) stand for?
  • hMDM-GMCSF is the abbreviation for human monocyte-derived macrophages. They are polarized [⇒ differentiated with GM-CSF] but non-activated [⇒ (-)] M1 macrophages. 
  • hMDM-MCSF is the abbreviation for human monocyte-derived polarized [⇒ differentiated with M-CSF] but non-activated [⇒ (-)] M2 macrophages. 

  The macrophages can be seeded into all kinds of TC vessels. After plating, they can be maintained as biologically functional adherent cultures for several weeks.Optionally, user-customizable activation of the cells can be performed. For details, please see attached Application Note, page 2, Fig. 3 and page 5, Tab. 1).

  Related Links and Documents

  • Application Note: Assay-ready adherent cultures of fully functional human primary macrophages using cryopreserved cells
  • Cryopreserved Macrophages
  • Macrophage Generation Media DXF
• If I isolate fresh CD14-monocytes for M1/M2 macrophage generation, can I culture them for a period of time before differentiation?

  This is not advised. Please seed the freshly isolated CD14-monocytes immediately in the Monocyte Attachment Medium. Adding a culturing step will change the biological characteristics of monocytes very rapidly.

  Related Links and Documents

  • Application Note: Differentiation of M1- or M2-Macrophages from PBMC/Monocytes
  • Monocyte Attachment Medium
• Can you provide a list of cell lines that have been successfully used for tumorsphere formation with the PromoCell 3D Tumorsphere Medium XF?

  The following cell lines have been tested at PromoCell to form tumorspheres in 3D Tumorsphere Medium XF (C-28070):

  • U-87 MG
  • MCF-7
  • MDA-MB-231
  • HT-29
  • HT1080
  • HepG2
  • A-549
  • Panc-1
  • LNCaP
  • A-431

  ⇒ For more details, please view the attached Application Note.
  In addition, we have received customer feedbacks for the following cell lines:

  • HCT-116 (human colorectal carcinoma cell line)
  • Capan-1 (human pancreatic adenocarcinoma cell line)
  • PC3 (human prostate cancer cell line)
  • C42B (osteotropic prostate cancer cell line)
  • NCI-H23 (human lung epithelial adenocarcinoma cells)
  • IMR-32 (human neuroblast cell line)
  • A818-6 (human pancreatic ductal adenocarcinoma cell line)
  • HEK293 (human embryonic kidney cells)
  • Calu-1 (non-small-cell lung cancer cell line)

  Related Links and Documents

  • Application Note: Tumorsphere Culture of Cancer Stem Cells (CSC) with the PromoCell 3D Tumorsphere Medium XF
  • 3D Tumorsphere Medium XF
• Can PromoCell MSC Growth Medium 2 (C-28009) be used for Mesenchymal Stem Cells from rat?

  Yes, we have received a customer feedback that our MSC Growth Medium 2 also works for rat MSCs.
  The rat cells grow nicely in this medium and have a good viability.

  Related Links and Documents

  • MSC Growth Medium 2
• Which medium does PromoCell recommend for endothelial cell transfection ?

  There are several factors that can influence successful transfections, e.g. viability and density of the cells, choice of the transfection reagent, quality and type of the transfected molecules (plasmids, siRNA, oligonucleotides), as well as the culture medium and supplements used.
  When using PromoCell Endothelial Cell Growth Media for cell transfection, please follow the instructions below:

  Heparin, which is included in our Endothelial Cell Growth Medium (C-22010/C-22110), Medium 2 (C-22011/C-22111) and Medium MV (C-22020/C-22120) may reduce the transfection efficiency.  We therefore recommend to use our heparin-free Endothelial Cell Growth Medium MV2 (C-22022/C-22121). Alternatively, you may use Endothelial Cell Growth Medium Kit (C-22110), Medium 2 Kit (C-22111), or Medium MV Kit (C-22120) without adding the ECGS/heparin supplement to the Basal Medium.

  Please note: Before and after transfection, the cells should be cultured in complete Growth Medium including heparin to ensure optimal growth.

  Related Links and Documents

  • Manual: Endothelial Cell Growth Medium/Medium 2
  • Manual: Endothelial Cell Growth Medium MV/ MV2
  • Cell Transfection reagents
• Are there PromoCell specialized media / primary human cells alternatives to other supplier’s products?

  Please see our attached alternative product guides for media and cells.

  Please note: Our media do not contain antibiotics. For optimal cell growth, we recommend to refrain from using antibiotics. However, when a sterile environment cannot be 100% ensured, it may be advisable to add antibiotics to your media so as to protect the cultures from potential microbial infections.

  Related Links and Documents

  • Alternative Product Guide - Primary Human Cells: Lonza® – PromoCell
  • Alternative Product Guide - Primary Human Cell Media: Lonza® – PromoCell
  • PromoCell's packaging systems: Medium (Ready-to-use) vs. Medium Kit
• Do I have to use coated tissue culture vessels for culturing PromoCell Normal Human Cells?

  It is not necessary to use coated flasks for (most of) our Normal Human Cells but it can be done. As coating with extracellular matrix proteins can affect cellular metabolism, it is recommended to use the same coating material for a complete set of experiments.
  Cells that need to be grown on coated dishes:

  • Mesenchymal Stem Cells (C-12974/C-12971/C-12977) need Fibronectin-coating when grown in PromoCell MSC Growth Medium XF (C-28019) and when differentiated in MSC Neurogenic (C-28015), Adipogenic (C-28016), or Osteogenic (C-28013) Differentiation Media.
  • Human monocyte-derived macrophages (C-12914/C-12916/C-12915/C-12917) must be seeded into Fibronectin-coated culture vessels in combination with PromoCell’s M1- and M2-Generation Media XF (C-28055, C-28056).
  • For efficient induction of osteoblast mineralization with PromoCell’s Osteoblast Mineralization Medium (C-27020), the TC plates should be pre-coated with collagen type I.

  Related Links and Documents

  • Mesenchymal Stem Cell Culture
  • Macrophage Cell Culture
  • Osteoblast Cell Culture
  • Fibronection Solution
• Does the PromoCell 3D Tumorsphere Medium XF (C-28070) maintain the stem cell character of cancer stem cells?

  During our quality control we do not determine the presence or maintenance of respective stem cell markers in the tumorspheres. We use a functional approach instead, by culturing the tumorspheres over serial passages in C-28070. Tumorsphere formation requires the biological features of Anoikis resistance and self-renewal and therefore indicates the presence of cancer stem cells (CSC)/cancer initiating cells (CIC) in the spheres. 3D tumorsphere culture thus allows scientists to study the biology of CSCs without any background knowledge on CSC markers.

  Related Links and Documents

  • Product Manual: 3D Tumorsphere Medium XF
  • Application Note: Tumorsphere Culture of Cancer Stem Cells (CSC) with the PromoCell 3D Tumorsphere Medium XF
  • Application Note: Determination of the Tumorsphere Formation Efficiency (TFE) with the PromoCell 3D Tumorsphere Medium XF
• What are the characteristic markers of HDLEC (C-12216, C-12217) and HDBEC (C-12211, C-12225)?
  • HDLEC and HDBEC both express the typical endothelial cell marker CD31 (= PECAM-1). 
  • HDLEC cultures are additionally tested positive for podoplanin, a transmembrane glycoprotein involved in lymphatic vessel formation, whereas HDBECs are podoplanin-negative.

  Related Links and Documents

  • Microvascular Endothelial Cells
• Can I use the 3D Tumorsphere Medium XF for mouse cell lines?

  Yes, we have received a customer feedback that our 3D Tumorsphere Medium XF (C-28070) has been successfully used for tumorsphere formation of mouse cell lines.

  Related Links and Documents

  • Tumorsphere Culture of Cancer Stem Cells (CSC) with the PromoCell 3D Tumorsphere Medium XF
  • 3D Tumorsphere Medium XF
• What’s the chemical basis of Mycoplasma-ExS Spray? How does it work?

  Mycoplasma-ExS Spray uses a silver-based technology to eliminate microbes. It contains active polymerically stabilized ionical silver chloride (AgCl) that is UV-stable. 
  The silver chloride forms a thin film on any surface, providing an immediate antimicrobial effect. Moreover, it can be also used for long-term elimination because the silver and chloride ions are released extremely slow from the silver polymer layer.
  Mycoplasma-ExS is effective against a broad spectrum of unwanted microbes commonly found in biological labs including Mycoplasma, Pseudomonas aeruginosa, Escherichia coli, Enteroccocus hirae, and Staphylococcus aureus. 

  Related Links and Documents

  • Mycoplasma-ExS Spray
• When should I use phenol red-free basal media for cell culture?

  It has been shown that phenol red has estrogenic properties. Phenol red-free media are therefore generally used in studies evaluating steroid hormone action in cultured, estrogen-responsive cells (Berthois et al., 1986). Furthermore, phenol red can also interfere with some analytical methods like photometric analyses.

  Related Links and Documents

  • Berthois et al.; Proc Natl Acad Sci U S A. 1986 Apr;83(8):2496-500
• Where can I find the composition of your basal media?

  The formulation of our basal media is proprietary information. If you need to know the concentration of a particular component for your experiments, please contact the PromoCell Technical Customer Service.

• Where can I find the composition of the supplements?

  The qualitative and quantitative composition of the supplements can be found on our website and in the data sheets of the specialized media. When there is no such information specified, the composition of the supplements is confidential.

• What antibiotics concentration should I add to the PromoCell media?

  If antibiotics are deemed necessary the recommended final concentrations are:
  100 U/ml penicillin + 100 µg/ml streptomycin or
  50 µg/ml gentamicin + 50 ng/ml amphotericin B

  Please note: Addition of antibiotics can reduce the growth rate of the cells.

• Are the Renal Epithelial Cells isolated from proximal or distal tubuli?

  PromoCell provides two types of Renal Epithelial Cells: Human Renal Epithelial Cells (HREpC) and Human Renal Cortical Epithelial Cells (HRCEpC).
  HREpC are isolated from the adult kidney and stain positive for cytokeratin. They comprise a heterogeneous population of renal epithelial cells. HRCEpC are isolated from the cortex of the kidney and comprise cells from proximal and distal tubuli. They also stain positive for cytokeratin.

  Related Links and Documents

  • Epithelial Cells
• How does PromoCell characterize their kidney cells (HREpC; HRCEpC) ?

  Our kidney cells are characterized by their epithelial cell morphology and by cytokeratin expression using a pan-cytokeratin antibody.

  Related Links and Documents

  • Renal epithelial cells
• What is the difference between PromoCell’s HREpC and HRCEpC?

  Our HREpC (C-12665) comprise a heterogenous mixture of renal epithelial cells isolated from cortex and medulla. The HRCEpC (C-12660) are derived from renal cortex only.

  Related Links and Documents

  • Renal Epithelial Cells
  • Schematic structure of a kidney
• What could be the reason for a lower yield when using M2 Macrophage Generation Medium compared to M1 Macrophage Generation Medium for a culture started with the same monocytes?

  For the M2 Macrophage Generation Medium, it is extremely important that the shelf life of 2 weeks (after addition of the cytokines) is not exceeded; the yield will quickly decrease thereafter. It is best to use the M2 medium as fresh as possible to avoid discrepancies between M1 and M2 yield.

  Related Links and Documents

  • Application Note: Differentiation of M1- or M2-Macrophages from PBMC/Monocytes
  • Macrophage Generation Media DXF
• Can the PromoKine 3D Cell Culture Harvesting Kit also be used to isolate cells from Collagen or Laminin matrices?

  Yes, it is possible. The kit is matrix agnostic. However, it might be necessary to optimize the incubation time.

  Related Links and Documents

  • Instruction Manual: 3D Cell Culture Harvesting Kit
  • 3D Cell Culture - Cell Harvesting