Positive Samples: Mouse brain, Mouse testis, Mouse heart, Rat brain, Rat testis, Rat heart Immunogen sequence: YLRRQGVCVR TENLAKYVAE LSLLEADPFL KYLPSLIAAA AFCLANYTVN KHFWPETLAA FTGYSLSEIV PCLSELHKAY LDIPHRPQQA IREKYKASKY L. Cyclins are regulatory subunit