IL2 and neoplasm: To examine if the initial B-cell line CLBL-1 as well as the CLBL-1M cell line derived from a Rag2−/−γc−/− mouse tumor respond in the same dose-dependency as primary B-cells to DSP30 and IL-2 stimulation with a higher mitotic rate, the two cell lines were incubated with DSP30 and IL-2 to measure the proliferation subsequently by BrdU incorporation.