enkephalin(redirected from encephalin)
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Related to encephalin: enkephalin
either of two pentapeptides, composed of four identical amino acids and either leucine or methionine, referred to as leu-enkephalin and met-enkephalin. The enkephalins function as neurotransmitters or neuromodulators at many locations in the brain and spinal cord and are involved with pain perception, movement, mood, behavior, and neuroendocrine regulation; they are also found in nerve plexuses and exocrine glands of the gastrointestinal tract.
Either of two closely related pentapeptides having opiate qualities and occurring in the brain, spinal cord, and other parts of the body.