Summary
Labeling experiments have shown that the chrysomelid beetleChrysolina coerulans is able to biosynthesize its own defensive cardenolides from cholesterol, via a pathway involving a C21 intermediate, as in plants.
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Van Oycke, S., Braekman, J.C., Daloze, D. et al. Cardenolide biosynthesis in chrysomelid beetles. Experientia 43, 460–462 (1987). https://doi.org/10.1007/BF01940455
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DOI: https://doi.org/10.1007/BF01940455