Arsenate

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Structure of arsenate
Structure of arsenate

The arsenate ion is AsO43−.

An arsenate (compound) is some compound that contains this ion.

See category for a list.

Arsenate is much like phosphate. In acid conditions we have arsenic acid, H3AsO4; in weakly acid conditions we have the dihydrogen arsenate ion, H2AsO4−; in weakly basic conditions we have hydrogen arsenate ion HAsO42−; and finally, in basic conditions, the arsenate ion AsO43−.

[edit] Arsenate poisoning

Arsenate can replace inorganic phosphate in the step of glycolysis that produces1,3-bisphosphoglycerate to produce 1-arseno-3-phosphoglycerate instead. This molecule is unstable and quicly hydrolyes, forming the next intermediate in the pathway, 3-phosphoglycerate. Therefore glycolisis proceeds, but the ATP molecule that would be generated from 1,3-bisphosphoglycerate is lost - arsenate is an uncoupler of glycolysis.

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