Lutein-5,6-epoxide aycle: A new xanthophyll cycle in higher plant chloroplasts

Research paper by V. G. Ladygin

Indexed on: 27 Jul '08Published on: 27 Jul '08Published in: Biochemistry (Moscow) Supplement Series A: Membrane and Cell Biology


The published data and the general characteristics of the lutein-5,6-epoxide cycle identified recently in higher plants are reviewed. The localization of the cycle in chloroplast membranes and its light-dependent activity are compared to the corresponding parameters of the well-studied widely occurring violaxanthin cycle. It is suggested that these cycles involve either the same enzymes, violaxanthin de-epoxidase and zeaxanthin epoxidase, or non-mutated and mutated forms of the same enzyme (violaxanthin de-epoxidase and zeaxanthin epoxidase).