You have discovered a novel protein BUZZKILL that inhibits t…
You have discovered a novel protein BUZZKILL that inhibits the activation of M-Cdk. However, you later discover that M-Cdk directly inhibits the activity of BUZZKILL! The result is that once the first few M-Cdks in a cell are activated, those activated M-Cdks will inhibit BUZZKILL proteins, resulting in more rapid activation of other M-Cdks. Activated M-Cdk’s inhibition of BUZZKILL is an example of: