Positive Samples: U-87MG, HeLa, MCF7, PC-3, Mouse brain Immunogen sequence: EKKMSTPVEV LCKGFPAEFA MYLNYCRGLR FEEAPDYMYL RQLFRILFRT LNHQYDYTFD WTMLKQKAAQ QAASSSGQGQ QAQTPTGKQT DKTKSNMKGF. CNSK1A1 (CK1 alpha 1) is a member of the casein kinase I (CKI) gene