The transgene construct contains porcine kit ligand (KITL) controlled by the human cytomegalovirus promoter. The Tg(IL3)1Ygy, Tg(CSF2)2Ygy and Tg(KITLG)3Ygy transgenic constructs were co-injected into NIH/Swiss oocytes in David Bodine's lab at NCI. (J:94302)