The anaphase promoting complex or cyclosome (APC2) is an E3 ubiquitin ligase which is part of the SCF family of ubiquitin ligases. Ubiquitin ligases catalyse the transfer of ubiquitin from the ubiquitin conjugating enzyme (E2), to the substrate protein.

1: An architectural map of the anaphase-promoting complex. Thornton BR, Ng TM, Matyskiela ME, Carroll CW, Morgan DO, Toczyski DP; Genes Dev. 2006;20:449-460. PMID:16481473