An enzyme of long-chain fatty acid synthesis, that adds a two-carbon unit from malonyl-(acyl carrier protein) to another molecule of fatty acyl-(acyl carrier protein), giving a beta-ketoacyl-(acyl carrier protein) with the release of carbon dioxide. EC 2.3.1.41.

Synonyms: Synthase, 3-Keto-ACP, beta Keto-Acyl Carrier Protein Synthase II, beta-Ketoacyl-Coenzyme A (CoA) Synthase, 3-Oxoacyl (Acyl Carrier Protein) Synthase, Synthetase, 3-Oxoacyl, Acyl-(acyl carrier protein):malonyl-(acyl-carrier-protein) C-acyltransferase (decarboxylating), 3-Oxoacyl Synthetase, Acyl Malonyl ACP Condensing Enzyme, 3 Keto ACP Synthase, 0, beta Keto-Acyl Carrier Protein Synthase I, beta Keto Acyl Carrier Protein Synthase I, Condensing Enzyme, Acyl-Malonyl-ACP, beta Keto Acyl Synthetase, 3-Oxoacyl-(Acyl-Carrier-Protein) Synthase, Acyl-Malonyl-ACP Condensing Enzyme, EC 2.3.1.41, beta Keto Acyl Carrier Protein Synthase II, beta Ketoacyl ACP Synthase, 3 Oxoacyl Synthetase, 3 Oxoacyl (Acyl Carrier Protein) Synthase, 3-Keto-ACP Synthase