Letter T

Thromboxane

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A substance made by platelets that causes blood clotting and constriction of blood vessels.

There are two thromboxanes.

Thromboxane A2 (TXA2) is active but is very unstable and has a half-life of only 30 seconds before it undergoes hydrolysis to form thromboxane B2 (TXB2) which is inactive.

The thromboxanes are derived from arachidonic acid and are related to prostaglandin

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