CD34 and acute myeloid leukemia: Bradbury and colleagues characterized expression of all 18 members of the HDAC family in primary acute myeloid leukemia blasts, and in four types of control cell (CD34+ progenitors from the umbilical cord, either quiescent or cycling (post-culture), cycling CD34+ progenitors from granulocyte-colony stimulating factor-stimulated adult donors, and peripheral blood mononuclear cells).