4.1.1.17	ornithine decarboxylase	A31N-ts20 cell	a Balb/c mice-derived mouse cell line	696087	
6.2.1.45	E1 ubiquitin-activating enzyme	A31N-ts20 cell	mouse embryo fibroblast cell, thermosensitive for ubiquitin-activating enzyme E1	727412, 728028