Tris(2-carboxyethyl)phosphine

**Semantic type:** Indicator, Reagent, or Diagnostic Aid|Organic Chemical

**Definition:** An agent used in peptide mapping to reduce cysteine-containing disulfides to thiols.

**Synonyms:** - 3,3',3''-Phosphinidynetrispropanoic acid - Propanoic acid, 3,3',3''-phosphinidynetris- - TCEP