Side chain polarity Reset Display the side chain carboxyl group as Ball & Stick. Some facts on L-glutamic acid. Abbreviation: Glu. One-letter code: E, (near G). Molecular mass: 147 daltons. Side chain (or R-group) features: Structural formula: Formula: -(CH2)2-COO-; Category: polar; acidic. pKa: 4.3. Return to image of Glu.
Some facts on L-glutamic acid.