Fig. 2.
Levels of EpoR mRNA in G418r clones of Ba/F3 cells transfected with the EpoR expression plasmid. Note that exogenously derived EpoR mRNA in G418r clones was larger in size than endogenous EpoR mRNA present in Friend erythroleukemia cells. V-1 is a G418r clone transfected with the p75/15 vector lacking EpoR cDNA.