Fig. 2

a Semaphorin 4D (Sema4D) levels (ng/ml) in the supernatants of ovarian and multiple myeloma cell lines after 24 and 48-h incubation with stromal cell line HS5. b Plexin-B1 levels (ng/ml) in the supernatants of ovarian and multiple myeloma cell lines after 24 and 48-h incubation with stromal cell line HS5