Various expressions of human CKIδ and CKIϵ mRNAs. RNA blot analysis of various normal human tissues (A) and human CD34⁺ hematopoietic stem cells and normal peripheral leukocytes (B) by using CKIδ- and CKIϵ-specific cDNA probes. Granulocytes, monocytes, and lymphocytes were prepared as PMNs, adherent-, and nonadherent MNC fractions, respectively. The signal that hybridized with the glyceraldehyde-3-phosphte dehydrogenase (G3PDH) cDNA probe is shown as a control.