Positive test controls include: OVCAR3. Immunogen sequence: TSTPGTSTVD VGTSGTPSSS PSPTTAGPLL MPFTLNFTIT NLQYEEDMRR TGSRKFNTME SVLQGLLKPL FKNTSVGPLY SGCRLTLLRP EKDGAATGVD A. CA 125 determinant is present on a high molecular weight, mucin like glycoprotein