Immunogen sequence: QPLVGIETLP PDLRDFVEED NQRFEKELEE WDAQLAQKAL QEKLLASQKL RESETSVTTA QAAGDPEYLE QPSRSDFSKH LKEETIQIIT KASHEHEDKS PETVLQSIMM TPNMQGIIMA IGKSRSVYDR CGPEAGFFK. Modification of target proteins by ubiquitin participates in a wide array of bio