Fig. 4.
Regression plots of feline cultured cells in the presence of erythropoietin (EPO) (0, 0.1, 0.01, 0.001, 0.0001 and 1 U/well) with or without foetal calf serum (FCS). Regression plots for the 2 h interval are depicted in black and individual values are marked as x. The 4 h interval is depicted in grey showing the individual values as ○. FOS_1077 and FCS_1140 cells showed a significant increase in their absorbance in the presence of FCS, but not without FCS.