BSG and ovarian carcinoma: Expression of the tetraspanins and five other common membrane proteins (CD147, CD98, CD71, CD29, CD49f) was confirmed in human cell lines of diverse origin, namely, 293T (embryonic kidney), HeLa (cervical carcinoma), SKOV3 (ovarian carcinoma, OVCA) and 786‐O (renal cell carcinoma, RCC) (Figure S1).