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. 1989 Jul;90(3):1077–1083. doi: 10.1104/pp.90.3.1077

b-Type Cytochromes in Higher Plant Plasma Membranes 1

Han Asard 1,2, Mireille Venken 1,2, Roland Caubergs 1,2, Willem Reijnders 1,2, Fred L Oltmann 1,2, Jan A De Greef 1,2
PMCID: PMC1061846  PMID: 16666854

Abstract

The composition and characteristics of b-type cytochromes from higher plant plasma membranes, purified using aqueous two-phase partitioning, were investigated. At least three different cytochromes were identified by their wavelength maxima and redox midpoint potentials (E0′). Cytochrome b-560.7 (E0′ from + 110 to + 160 millivolts) was present in zucchini (Cucurbita pepo) hypocotyls and bean (Phaseolus vulgaris L.) hooks, although in different concentrations. The main component in cauliflower (Brassica oleracea L.) inflorescences (cytochrome b-558.8) is probably functionally similar to this cytochrome. The plasma membrane generally contains two to three cytochrome species. However, the occurrence and concentrations were species dependent. The high potential cytochrome can be reduced by ascorbate but not NADH, and may be involved in blue light perception.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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