What is the exact localization of PromoCell's HRCEpC? Are the cells isolated from proximal or distal tubuli?

Our Human Renal Cortical Epithelial Cells (C-12660) are isolated from the cortex of the human kidney. The renal cortex is the outer portion of the kidney. It contains the renal corpuscles, the proximal and distal convoluted tubules, and the cortical collecting ducts.