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SUMMARY Ribulose bisphosphate carboxylase (RUBPCase) was localized by fluorescence and gold immunocytochemistry in Capsicum fruits. Chloroplasts of the green fruit are heavily labelled. A positive staining is also obtained with chromoplasts of the ripe rad fruit, but gold labelling is fainter. The presence of reactive RuBPCase in chromoplasts is discussed in relation with the absence of ribosomes in these plastids.
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Chéniclet et al. (1988) studied this question.
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