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pubmed:abstractText |
We describe here the complete amino acid sequence of photosystem I subunit IV from Synechocystis 6803. The molecular mass of 8.0 kDa is lower than in higher plants and Chlamydomonas, due to the lack of a characteristic, proline-rich, N-terminal sequence. The remaining sequence exhibits a good conservation, with a hydrophilic and strongly basic N-terminal head followed by two hydrophobic domains. There is no possibility of classical membrane-spanning alpha helices. This component is likely to be one of the most stroma accessible subunits of photosystem I.
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