FastSaying

Green, red, and mixed shades of haemins are known. If magnesium is replaced by iron in chlorophyll, green haemins are obtained. Their colour is due to a strong band in the red which is already recognized in chlorophyll.

Otto Heinrich Warburg

BandColourDueGreenIronKnownMixedObtainedRecognizedRedReplacedShadesStrongWhich

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