Peptide secreted by neurons as a signaling molecule either at synapsis or elsewhere.

short-chain protein that can act like a neurotransmitter.

A chain of amino acids that functions in cell signaling in the nervous system.

A small molecule that can regulate nerve cell function and is made up of amino acids.

a peptide that is active in association with neural tissue A peptide hormone is a peptide that acts as a hormone

A peptide (short chain of amino acids) neurotransmitter.

A member of a class of protein-like molecules made in the brain. Neuropeptides consist of short chains of amino acids, with some functioning as neurotransmitters and some functioning as hormones.

molecule of two to about 40 amino acids that occurs naturally in the brain and acts primarily to modulate responses associated with neurotransmitters; examples are enkephalins and endorphins

Specialized peptidergic neurotransmitters encoded as preproproteins that are posttranslationally processed to yield bioactive neuropeptides. They modulate synaptic signaling through other, small-molecule, neurotransmitters and exert their function via seven-span transmembrane receptors. Thirty-two neuropeptide-like proteins have been identified in C. elegans ( Nathoo et al., 2001). See Neurotransmitter

A neuropeptide is any of the variety of peptides found in neural tissue; e.g. endorphins, enkephalins. Now, about 100 different peptides are known to be released by different populations of neurons in the mammalian brain.