
doi: 10.1007/bf02175840
Many dark-coloured species ofAphididae contain a colouring matter (protoaphin) of unusual structure in the haemolymph. After death of the insect this undergoes a remarkable series of changes by enzymic action yielding successively the pigments xanthoaphin, chrysoaphin and erythroaphin. Recent investigations leading to the complete structural elucidation of all these pigments is described.
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