There are two kinds of aldolases. Class I aldolases are found in animals and plants; Class II

Question:

There are two kinds of aldolases. Class I aldolases are found in animals and plants; Class II aldolases are found in fungi, algae, and some bacteria. Only Class I aldolases form an imine. Class II aldolases have a metal ion (Zn2+) at the active site. The mechanism for catalysis by Class I aldolases was given in Section 24.9. Propose a mechanism for catalysis by Class II aldolases.