Positive test controls include: U-87MG, Mouse lung. The target is usually found in the following locations: Cell membrane. Immunogen sequence: MSAADEVDGL GVARPHYGSV LDNERLTAEE MDERRRQNVA YEYLCHLEEA KRWMEACLGE DLPPTTELEE GLRNGVYLAK LGNFFSPKVV SLKKIYDREQ.