The red-absorbing chlorophyll a antenna states of photosystem I: a hole-burning study of Synechocystis sp. PCC 6803 and its mutants

Article Abstract:

Low-temperature absorption and persistent nonphotochemical hole burning experiments have been undertaken on wild-type (WT) trime and WT monomer of the cyanobacterium Synechocystis and its F, K, L and M mutants. It was found that there are red Chls absorbing at 714 nm which were not resolved in previous low-temperature experiments.

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Red chlorophyll a antenna states of photosystem I of the cyanobacterium Synechocystis sp. PCC 6803

Article Abstract:

Research into the antenna chlorophyll a molecules of photosystem I of green plants and cyanobacteria that absorb further to the red than P700 is presented. It is suggested that the 714 nm antenna state is responsible for the fluorescence origin band near 720 nm.

Cyanobacteria

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Excited states of the 5-chlorophyll photosystem II reaction center

Article Abstract:

Issues concerning 4.2 K hole burning, chemical reduction and oxidation experiments on the isolated photosystem II reaction centre containing five chlorophyll molecules are discussed. These findings offer no support for the multimer model.

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