Sequence alignment between 4a4c(C) and UniProt seq P62837 (UB2D2_HUMAN):

P62837 (UB2D2_HUMAN): Ubiquitin-conjugating enzyme E2 D2 from Homo sapiens
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------
UniProt: MALKRIHKELNDLARDPPAQCSAGPVGDDMFHWQATIMGPNDSPYQGGVFFLTIHFPTDYPFKPPKVAFTTRIYHPNINSNGSICLDILRSQWSPALTISKVLLSICSLLCDPNPDDPLVPEIARIYKTDREKYNRIAREWTQKYAM
         ................................................................................................................................X..................
PDB seq: -ALKRIHKELNDLARDPPAQCSAGPVGDDMFHWQATIMGPNDSPYQGGVFFLTIHFPTDYPFKPPKVAFTTRIYHPNINSNGSICLDILRSQWSPALTISKVLLSICSLLCDPNPDDPLVPEIARIYK-DREKYNRIAREWTQKYAM
          --------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------- +---------+-------
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140