Immunogen sequence: PWYNEHGTQS KEAFAIGLGG GSASGKTTVA RMIIEALDVP WVVLLSMDSF YKVLTEQQQE QAAHNNFNFD HPDAFDFDLI ISTLKKLKQG KSVKVPIYDF TTHSRKKDWK TLYGANVI Highest antigen sequence identity to the following orthologs: Mouse - 97%, Rat - 96%. Uridine kinase is