Black soybeans (image)

Caption
The scientists examined how much Cy3G and 2F3G were present in the black soybean seed coat as it turned colour from green to black once it was exposed to air and light. The immature seed coat contains the colorless precursor, 2F3G, which is oxidized to Cy3G, turning the seed black.
Credit
Kumi Yoshida
Usage Restrictions
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