The guinea pig 5-hydroxytryptamine(5A) (gp5-ht(5A)) receptor was cloned from guinea pig brain using degenerate polymerase chain reaction (PCR) and shows 88%, 85% and 84% amino acid sequence identity versus the human, rat and mouse 5-ht(5A) receptors, respectively. The receptor was transiently expressed in human embryonic kidney (HEK) 293 cells. [(3)H]-Lysergic acid diethylamide (LSD) bound saturably to gp5-ht(5A)/HEK293 membranes with a K(d) of 2.
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