Abstract
Preparations of NADH-specific and NADPH-specific, 3-oxoacyl-[acyl-carrier-protein] reductase enzymes (EC 1.1.1.100), enoyl-[acyl-carrier-protein] reductase (EC- 1.3.1.9) and [acyl-carrier-protein] malonyltransferase (EC 2.3.1.39) have been purified from preparations of avocado mesocarp plastids and characterized. The enzymes are quite similar in molecular and kinetic characteristics to analogous enzymes known in Escherichia coliand Euglena and are clearly components of a type-II fatty acid synthetase system.