What is the source of PromoCell's Normal Human Follicle Dermal Papilla Cells? For how long can they be maintained in culture?

HFDPC are isolated from the hair papilla of normal human scalp hair follicles. Hair papilla in the adult hair follicle play a crucial role in the dermal-epidermal interactions that control hair production and in hair growth cycle events. The follicle dermal cells are cryopreserved at second passage and can be cultured for at least 10 population doublings when using PromoCell Follicle Dermal Papilla Cell Growth Medium (Cat. C-26501). Typical population doubling times are between 20-36 hrs. The recommended seeding density after thawing/trypsinization is 5;000-10;000 cells/cm². Using 1:4 splits; you can perform 4-5 passages with the cells.