Enkephalins are endogenous peptides that belong to the class of opioid peptides, which play a critical role in modulating pain and emotional responses in the brain. They primarily bind to opioid receptors, particularly the delta receptors, and help reduce the perception of pain while also influencing mood and stress responses. These peptides are produced in various parts of the central nervous system, contributing to the body's natural ability to alleviate pain.
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