>1y8x_A: Ubiquitin-conjugating enzyme E2 M GSMASAAQLRIQKDINELNLPKTCDISFSDPDDLLNFKLVICPDEGFYKSGKFVFSFKVGQGYPHDPPKVKCETMVYHPN IDLEGNVCLNILREDWKPVLTINSIIYGLQYLFLEPNPEDPLNKEAAEVLQNNRRLFEQNVQRSMRGGYIGSTYFERCLK >1y8x_B: Ubiquitin-activating enzyme E1C GSSQLPQNIQFSPSAKLQEVLDYLTNSASLQMKSPAITATLEGKNRTLYMQSVTSIEERTRPNLSKTLKELGLVDGQELA VADVTTPQTVLFKLHFTS