Tumor induced in nude mouse injected with blast cells from ascites fluid of newborn Balb/c mouse injected intraperitoneally with Rauscher murine leukemia virus (supernate of producer cell line JLS-V9); descibed to be heterotransplantable, to form colonies in soft agar, to display myeloid cytochemical (myeloperoxidase) and functional (phagocytosis) features, and to differentiate terminally in response to DMSO