The chirality of the sugar moiety is responsible for the chiral molecular recognition on formation of a metalloanthocyanin from Salvia patens. This mechanism was revealed by using the synthetic apigenin 7,4'-diglucosides derived from D- or L-glucose. The supermolecule consists of six malonylawobanin molecules (blue) coordinated to two Mg²⁺ ions (red) with an M-helical arrangement of six 7,4'-diglucoside molecules (yellow) intercalated.
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Kondo et al. (2001) studied this question.
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