Chloroplasts from 5 to 7 day old Vigna radiata seedling, grown under alternate light/dark conditions or from green Euglena gracilis Z. cells have been found to harbor L-myo-inositol-1-phosphate synthase (EC 5.5.1.4) activity. In contrast, dark-grown V. radiata seedlings, or streptomycin-bleached Euglena cells exhibit either reduced or no enzyme activity. An apparent enhancement of the chloroplastic inositol synthase by growth in presence of light is observed.
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Adhikari et al. (1987) studied this question.