Citrate is a major component of snake venoms.

Citrate has been identified as a major component of snake venoms by gas liquid chromatography and mass spectrometry. The venoms of Bothrops asper, Crotalus atrox, Crotalus viridis viridis, Crotalus adamanteus, Sistrurus miliarius barbouri, Crotalus horridus horridus, Agkistrodon contortrix mokasen, Agkistrodon contortrix contortrix and Agkistrodon piscivorus piscivorus contain citrate at concentration levels which can serve as effective buffers. Calcium, magnesium, zinc, iron, sodium and potassium salts of citrate would be constituents of venom.