Cystathionine

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

**Definition:** An amino acid derivative that is an intermediate in the biosynthesis of cysteine. It is the product of the ligation of homocysteine and serine by cystathionine beta synthase.

**Synonyms:** - 2-Amino-4-(2-Amino-2-Carboxy-Ethyl) Thio-Butanoic Acid - 2-Amino-4-[(2-Amino-2-Carboxyethyl)Sulfanyl]Butanoic Acid - DL-Allocystathionine - DL-Cystathionine - Homocysteine, S-(2-Amino-2-Carboxyethyl)- - S-(2-Amino-2-Carboxyethyl)Homocysteine