treatment of friend cells with 0.5 mm 8-bromoadenosine 3':5'-monophosphate ( 8-br-camp ) and 0.2 mm methylisobutyl xanthine for 2 days did not stimulate cell differentiation . however , the camp-binding capacity nearly doubled and the cells accumulated a high level of r ii while r i declined .
C0007589
cell differentiation
C0007634
cells