plastocyanin

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plastocyanin A blue copper-containing protein that is found in chloroplasts and acts as an electron carrier molecule in the light-dependent reactions of photosynthesis (see photophosphorylation). Plastocyanin consists of amino acid groups in association with a copper molecule which gives this compound a blue colour.

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plastocyanin An acidic protein, containing 2 copper atoms per molecule, that acts as an electron carrier, linking photosystems I and II during photosynthesis.