Western blotting of selected proteins. Immunoblotting of 18 effusions using antibodies directed against Mucin B5 and the laminin γ-chain (Santa Cruz). Mucin B5 (upper panel) is expressed in the specimens in lanes 1,2,3,5,12 and 14. The laminin γ-chain is expressed in all specimens except those in lanes 5 and 13. The specimens analyzed were from1 to 17: OV08A, OV09A, OV10A, OV12A, OV11A, OV02A, OV04A, OV29P, OV06A, OV01A, OV32P, OV14A, OV12A2, OV18A, OV20A, Additional specimen not on array, OV37P.