ability of human marrow cells to be differentiated under the influence of human thymic extract was abolished by specific inhibitors of nucleic acid synthesis , however , had no inhibitory effect on the maturation of peripheral blood lymphocytes during a 2 hr incubation with human thymic extract but puromycin , an inhibitor of protein synthesis , abolished this differentiative step in cells of layer i .
C0007589
differentiated
C0007634
cells