beta-Endorphin

**Definition:** A 31-amino acid peptide that is the C-terminal fragment of BETA-LIPOTROPIN. It acts on OPIOID RECEPTORS and is an analgesic. Its first four amino acids at the N-terminal are identical to the tetrapeptide sequence of METHIONINE ENKEPHALIN and LEUCINE ENKEPHALIN.

**Tree numbers:** - D06.472.699.327.935.239 - D06.472.699.631.525.600.239 - D12.644.400.400.935.239 - D12.644.400.575.241.080 - D12.644.548.365.935.239 - D12.644.548.691.525.690.239 - D12.776.631.650.405.935.239 - D12.776.631.650.575.241.080

**Synonyms:** - Endorphin, beta - beta-Endorphin (1-31)