The effect of dCMP on the growth inhibition mediated by CDD and thymidine. Thymidine was added at 10^-4 mol/L concentration and rhCDD at 50 ng/plate. Mouse BMC were cultured in a GM-CFC agar assay and colonies (≥ 50 cells) were counted on day 7. Mean values ± SD are given as percent of controls. Symbols: dCMP (⧫), dCMP + rhCDD (▪), dCMP + rhCDD + thymidine (▴).