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The phytyl side chain of chlorophyll a derived from exogenous 13C- and 2H-labelled mevalonate in cultured cells of two species of liverworts, Heteroscyphus ptanus and Lophocolea heterophylla, is shown to be preferentially labelled in the farnesyl diphosphate-derived portion, while its biosynthesis from exogenous 13C-glycine results in equivalent labelling.
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Nabeta et al. (1995) studied this question.
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