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Citations and Validations
Enkephalins are the smallest of the molecules with pain killing or opiate activity. Enkephalins are found in the thalamus of the brain and in some parts of the spinal cord that transmit pain impulses. In the spinal cord, enkephalins inhibit painful sensations by reacting with specific receptor sites on the sensory nerve endings. Enkephalins bind to opiate receptors and release controlled levels of pain.