Regarding Plexin-B1, two myeloma cells lines (H929: 25.3 ng/ml and JJN3: 30.8 ng/ml) and two ovarian cancer cell lines (OVCA3: 5125 ng/ml and SKOV3: 3516 ng/ml) produced high levels compared to the other myeloma (4 ± 2.5 ng/ml) and ovarian cancer cell lines (27.6 ± 3.8 ng/ml). The gene discussed is PLXNB1; the disease is plasma cell myeloma.