|  |  | ubiquitin ligase complexnuclear ubiquitin ligase complexubiquitin thiolesterase activityubiquitin-specific protease activityprotein bindingnucleusDNA repairdouble-strand break repairproteolysiscellular response to DNA damage stimuluspeptidase activitymetallopeptidase activityresponse to X-rayresponse to ionizing radiationchromatin modificationhydrolase activityenzyme regulator activityG2 DNA damage checkpointpolyubiquitin bindingpositive regulation of DNA repairmetal ion bindingregulation of catalytic activityBRCA1-A complexprotein K63-linked deubiquitinationhistone H2A K63-linked deubiquitinationBRISC complex
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