The His452Tyr variant of the gene encoding the 5-HT2A receptor is specifically associated with consolidation of episodic memory in humans.

Abstract excerpt

Basic research has shown that serotonin plays an important role in memory formation. Accordingly, genetic variation of serotonin receptors can be expected to affect memory and to underlie, in part, the heritability of memory capacity. A study by de Quervain and colleagues found a highly significant association of the functional 5-HT2A receptor variant His452Tyr (rs6314) with long-term memory. We replicated this...

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