Sequence alignment between 4tkp(A) and UniProt seq P61088 (UBE2N_HUMAN):

P61088 (UBE2N_HUMAN): Ubiquitin-conjugating enzyme E2 N from Homo sapiens
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150  
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--
UniProt: MAGLPRRIIKETQRLLAEPVPGIKAEPDESNARYFHVVIAGPQDSPFEGGTFKLELFLPEEYPMAAPKVRFMTKIYHPNVDKLGRICLDILKDKWSPALQIRTVLLSIQALLSAPNPDDPLANDVAEQWKTNEAQAIETARAWTRLYAMNNI
         ......................................................................................................................XXXX..............................
PDB seq: ---LPRRIIKETQRLLAEPVPGIKAEPDESNARYFHVVIAGPQDSPFEGGTFKLELFLPEEYPMAAPKVRFMTKIYHPNVDKLGRICLDILKDKWSPALQIRTVLLSIQALLSAPNPD----NDVAEQWKTNEAQAIETARAWTRLYAMNNI
            ------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--------    -------+---------+---------+--
                 10        20        30        40        50        60        70        80        90       100       110                 130       140       150