Immunogen sequence: KSVLVVRHGE RVDQIFGKAW LQQCSTPDGK YYRPDLNFPC SLPRRSRGIK DFENDPPLSS CGIFQSRIA Antigen sequence identity: Mouse 84%; Rat 83%. TULA (T cell ubiquitin ligand, UBASH3A, ubiquitin associated and SH3 domain containing A), STS-2 or CLIP4, is a