PGE₂-d₉ contains nine deuterium atoms at the 17, 17’, 18, 18’, 19, 19‘, 20, 20, and 20‘ positions. It is intended for use as an internal standard for the quantification of PGE₂ by GC- or LC-mass spectrometry (MS). PGE₂ is one of the primary cyclooxygenase products of arachidonic acid and one of the most widely investigated prostaglandins. Its activity influences inflammation, fertility and parturition, gastric mucosal integrity, and immune modulation.^1,2,3,4 The effects of PGE₂ are transduced by at least four distinct receptors designated EP₁, EP₂, EP₃, and EP₄.⁵ Affinity constants (K_d) of PGE₂ for these receptors range from 1-10 nM depending on the receptor subtype and tissue.

≥99% deuterated forms (d₁-d₉)