TTFFLUOR Humar Dermal Fibroblasts (HDFs) are Red fluorescent primary HDFs, which has been developed transfecting the tGFP expression vector into the cell genome. These cells are expressing the red fluorescent protein gene sequences as free cytoplasmatic protein. TTFLUOR HDFs are intended to be used in cell-based assay applications providing consistent levels of tGFP expression during 10-15 doubling populations, the estimated proliferative capacity for these primary cells.