A second distinct chlorophyll a – protein complex in maize mesophyll chloroplasts

Abstract

A second distinct chlorophyll a – protein complex has been resolved in extracts of maize mesophyll chloroplasts. Resolution was accomplished through modified incubation and electrophoresis and through the use of a mutant deficient of chlorophyll b. This complex, complex IV, has an electrophoretic mobility similar to that of the light-harvesting chlorophyll a/b – protein and chlorophyll a is its major pigment component. Carotenoids are probably also present in this complex. Evidence to date indicates a correlation between the presence of complex IV and photosystem II.