Apcin-A is an anaphase-promoting complex (APC) inhibitor. It interacts strongly with Cdc20 and inhibits the ubiquitination of Cdc20 substrates. Apcin-A can be used to synthesize the PROTAC CP5V.
CFM-1 is an antagonist of the anaphase-promoting complex (APC)-2. It also is a cell cycle and apoptosis regulatory protein (CARP)-1 interaction antagonist.