Bifunctional protein from carrots (Daucus carota) with aspartokinase and homoserine dehydrogenase activities

摘要

A bifunctional enzyme has been isolated and purified from carrots which has both aspartokinase and homoserine dehydrogenase activities in the same polypeptide. The enzyme can be used to regulate lysine, homoserine, threonine, isoleucine and methionine content in plants. The DNA sequence encoding the bifunctional enzyme is also disclosed.