The molar mass of photosystem I (PS I) from the cyanobacterium Synechococcus PCC 7002 was determ ined by sedim entation equilibrium analysis in the analytical ultracentrifuge. For that purpose, the “trimeric” form of PS I was isolated and studied in three different nonionic detergents. After determining the partial specific volume of the protein/pigment complex, from the ultracentrifuge data, as (0.788 ± 0.010) ml g-1, Mr was obtained as 830,000 ± 60,000
: Photosystem I; Synechococcus; Protein-Detergent Complexes; Molar Mass Determination; Analytical Ultracentrifugation
Received: 1994-12-8
Published Online: 2014-6-2
Published in Print: 1994-4-1
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