Relative levels of expression of bcl2 hnRNA and bcl2 mRNA in CLL and normal B cells. The levels of bcl2 hnRNA and bcl2 mRNA in CLL and normal B cells from 4 CLL patients and 4 healthy volunteers were determined by RT-PCR. Results are expressed as the means of 4 determinations per group ± SEM. *P < .001 compared with normal B cells.