Light‐harvesting complexes of brown algae Biochemical characterization and immunological relationships

Abstract
The pigment composition of the light‐harvesting complexes isolated from several brown algae belonging to different orders has been analysed by reverse‐phase HPLC. Relative to whole chloroplasts, they were markedly enriched in Chlc, fucoxanthin and violaxanthin and conversely depleted in Chla. The relative molar proportions of the 4 main pigments (Chla/Chle/fucoxanthin/violaxanthin) ranged from 100:18:76:6 to 100:30:107:17. The protein moiety of LH complexes of all the species studied were composed of one or two main polypeptide components in the range of 19–22 kDa. Those polypeptide subunits were arranged in polymeric particles about 240 kDa inLaminaria saccharina. A polyclonal antibody raised against the LH polypeptide ofFucus serratushas been tested on LH apoproteins of other Chromophytes and Chlorophytes. Phylogenic inplications of these results discussed.

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