Immunogen sequence: FKSEDNNTED LKVTITKAGR KDDSTLCCWR HSTTEVSCQN QEYLFVYGGR SVVEPVLSDW HFLHVGTMAW VRIPVEGEVP EARHS Highest antigen sequence identity to the following orthologs: Mouse - 69%, Rat - 68%. TYW4 is an enzyme that participates in the wybutosine-