2.3.2.23	E2 ubiquitin-conjugating enzyme	transthioesterification	-	Homo sapiens	-	
2.3.2.24	(E3-independent) E2 ubiquitin-conjugating enzyme	transthioesterification	-	Homo sapiens	O00762, P49427, P49459, P51668, P51965, P60604, P61077, P61086, P61088, P62253, P62256, P62837, P63146, P68036, Q13404, Q15819, Q16763, Q712K3, Q8WVN8, Q969T4, Q96B02, Q96LR5, Q9NPD8, Q9Y2X8