Glycine polarity Reset (Side chain polarity of the other 19 amino acids is expressed relative to the "side-chainless", glycine.) Highlight the hydrogen that is substituted by R-groups in the other 19 L-amino acids. (With the carboxyl group facing you, L-amino acids have their R-group on the left. Substitution at the other position on the a-carbon would result in a D-amino acid.) Add a distance measure (in Å units). Some facts on glycine. Abbreviation: Gly. One-letter code: G. Molecular mass: 75 daltons. Side chain (or R-group) features: Structural formula: Formula: -H; pKa: none. Return to image of Gly.
Some facts on glycine.