Human 5-Hydroxytryptamine Receptor 3B, HTR3B ELI

This is one of the several different receptors for 5-hydroxytryptamine (serotonin), a biogenic hormone that functions as a neurotransmitter, a hormone, and a mitogen.

This receptor is a ligand-gated ion Channel, which when activated causes fast, depolarizing responses.

It is a cation-specific, but otherwise relatively nonselective, ion Channel.