cell surface receptors that bind prostaglandins with high affinity and trigger intracellular changes which influence the behaviour of cells. Prostaglandin receptor subtypes have been tentatively named according to their relative affinities for the endogenous prostaglandins. They include those which prefer prostaglandin d2 (dp receptors), prostaglandin e2 (ep1, ep2, and ep3 receptors), prostaglandin f2-alpha (fp receptors), and prostacyclin (ip receptors).
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... like the time bomb is a positive feedback loop between oxytocin and prostaglandin F2 (PGF2), initiated in the preovulatory follicle. PGF2... ... interferes with the PGF2 loop by blocking the genes which code for the receptors of estradiol and oxytocin; there is also suspected to be a protein ...
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