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magnesium chelatase ATPase subunit I This model represents one of two ATPase subunits of the trimeric magnesium chelatase responsible for insertion of magnesium ion into protoporphyrin IX. This is an essential step in the biosynthesis of both chlorophyll and bacteriochlorophyll. This subunit is found in green plants, photosynthetic algae, cyanobacteria and other photosynthetic bacteria. [Biosynthesis of cofactors, prosthetic groups, and carriers, Chlorophyll and bacteriochlorphyll]
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