3-Methylhistidine

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** A post-translationally modified amino acid found in actin and myosin and a derivative of histidine that has a methyl group bound to the nitrogen at position 3. Urinary levels of 3-methylhistidine are proportional to protein turnover and can be an indicator for myofibrillar protein degradation or a high protein diet.

**Synonyms:** - 3 MEH - 3-METHYLHISTIDINE - 3-MeHis - 3-Methyl-L-Histidine - 3MH - N(tau)-Methylhistidine - Ntau-Methylhistidine