MICROORGANISM FOR SELECTIVE PRODUCTION OF A SPECIFIC COMPONENT OF AVERMECTIN AND A METHOD FOR SELECTIVE PRODUCTION THEREOF

摘要

A microorganism for selective production of a specific component of avermectin having one or more of the following properties: - specific accumulation of avermectin component "a", - effective incorporation of isoleucine or its keto acid (3-methyl-2-oxovaleric acid) into the avermectin molecule, and - markedly suppressed incorporation of valine or its keto acid (2-oxoisovaleric acid) into the avermectin molecule.