Fig. 3.
[methyl-3H] Thymidine uptake by 32Dcl3 cell lines expressing wild-type and mutant GM-CSF receptors. Indicated cell lines were plated as described in the Materials and Methods. Each cell line was stimulated with either diluent, 200 pmol/L mGM-CSF, or 400 pmol/L hGM-CSF. After exposure to 1 μCi [methyl-3H]-thymidine, cells were obtained and counted.