Assay and substrate for arachidonoyl-specific phospholipase A2

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving hydrolase

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435 692, 435 19, 435 20, 435 11, 560152, 514103, 514 86, 514126, C12Q 134, C12P 2106, C07C32100, A01N 5736

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054647541

ABSTRACT:
A non-radioactive, spectrophotometric, microtiter plate assay for human cystolic phospholipase A.sub.2 (cPLA.sub.2) is described. The assay utilizes a novel synthetic thiol-phospholipid analog as a substrate. In one embodiment, the substrate is a phosphatidylcholine derivative with an arachidonoylthioester in the sn-2 position and an alkenyl-ether or alkenyl-ether in the sn-1 position. The alkyl-ether and the alkenyl-ether in the sn-1 position of the substrate ensures that the assay will only measure cPLA.sub.2 activity and will not be complicated by metabolism of the lysophospholipid product by the enzyme's and lysophospholypase activity.

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