AskDefine | Define arsenate

Dictionary Definition

arsenate n : a salt or ester of arsenic acid

User Contributed Dictionary

English

Noun

  1. Any salt or ester of arsenic acid.
  2. The anion AsO43-.
salt or ester of arsenic acid
  • Italian: arseniato
  • Spanish: arseniato

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Extensive Definition

The arsenate ion is AsO43−.
An arsenate (compound) is some compound that contains this ion.

Ions

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−.
Arsenate has a valency of 5 and is also known as pentavalent arsenic

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 quickly hydrolyzes, forming the next intermediate in the pathway, 3-phosphoglycerate. Therefore glycolysis proceeds, but the ATP molecule that would be generated from 1,3-bisphosphoglycerate is lost - arsenate is an uncoupler of glycolysis.
arsenate in Arabic: زرنيخات
arsenate in Bosnian: Arsenat
arsenate in German: Arsenate
arsenate in Spanish: Arseniato
arsenate in Dutch: Arsenaat
arsenate in Russian: Арсенаты
arsenate in Finnish: Arsenaatti
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