Plexin-B1 expression in CLL microenvironmental cells obtained from patients' BM.

Primary cultures of stromal cells and isolated T cells were evaluated for the expression of Plexin-B1 both at RNA level by RT-PCR (A) and at protein level by cytofluorograph analysis (B-C) with a polyclonal rabbit antihuman Plexin-B1 Ab (right panels) or with an irrelevant Ab as control (left panels).