Main Reaction: alpha-carotene >> lutein

Reference: PubMed ID: 21398427
Authors: Zhong YJ, Huang JC, Liu J, Li Y, Jiang Y, Xu ZF, Sandmann G, Chen F
Title: Functional characterization of various algal carotenoid ketolases reveals that ketolating zeaxanthin efficiently is essential for high production of astaxanthin in transgenic Arabidopsis.
Published: 2011 Jun

alpha-carotene --> lutein