Protein

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

**Definition:** A group of complex organic macromolecules composed of one or more chains (linear polymers) of alpha-L-amino acids linked by peptide bonds and ranging in size from a few thousand to over 1 million Daltons. Proteins are fundamental genetically encoded components of living cells with specific structures and functions dictated by amino acid sequence.

**Synonyms:** - Protein (NOS) - Proteins - protein