Claim: Carboxyglutamic acid (one of 500 naturally occurring amino acids) has a molar mass of 191.14 g/mol and density of 1.649 g/mL.
Evidence: About 500 naturally occurring amino acids are known (though only 20 appear in the genetic code) and can be classified in many ways. Carboxyglutamic acid (or the conjugate base, carboxyglutamate), is an uncommon amino acid introduced into proteins by a post-translational carboxylation of glutamic acid residues. Carboxyglutamic acid    Q2823245#P2566   C6H9NO6 191.14 g/mol 1.649 g/mL 418 °C (784 °F; 691 K) Boiling point Density Molar mass Chemical formula PubChem CID ECHA InfoCard UNII ChemSpider 3D model (JSmol) CAS Number