Cyclin D3 levels in preleukemia thymocytes and leukemia. Levels of cyclin D3 were detected by Western blot. Blots were reprobed with antiactin antibody (loading control). Lane 1, WT thymus; lane 2, TLMCD3ϵko; lane 3, LMO1CD3ϵko; lane 4, CD3ϵko thymus; lanes 5-7, leukemia LMO1CD3ϵko H59, H63, and H38.