three cell populations are modeled : cho-line cells released from a block at the interface of the g1-and s-phases , 3t3 cells released from a g1-phase block produced by serum starvation , and s49 mouse lymphoma cells responding to a block in the g1-phage produced by n6,02'-dibutyryl adenosine 3':5'-cyclic monophosphate ( bt2camp ) .
C0079395
g1-phase
C0007634
cells