title: Comparative Studies on Plastoquinones. IV. Plastoquinones in Algae.
abstract: Plastoquinones A and C have been found in all classes of algae, including representatives of greens, yellow-greens, blue-greens, reds, browns and the flagellate, Euglena. Plastoquinone C from red and brown algae can be separated into 6 different types. An additional plastoquinone C has been found in Gigartina and Rhydomela. From chromatographic evidence this may be equivalent to plastoquinone C(o), a C type with a hydroxyl group on the first isoprene unit of the terpenoid sidechain of this substituted benzo-quinone. The ubiquinone, vitamin K and alpha-tocopherylquinone content of several algae is also reported. The presence of plastoquinone A in all green plants and many algae indicates that it may be a functional element in photosynthesis. Our study shows that plastoquinone C is more regularly present in algae than has been previously shown.
authors.affiliation: Department of Biological Sciences, Purdue University, Lafayette, Indiana 47907.
authors.forename: E
authors.initials: E
authors.lastname: Sun
authors.forename: R
authors.initials: R
authors.lastname: Barr
authors.forename: F L
authors.initials: FL
authors.lastname: Crane