Side chain polarity Reset Display the phenyl group as Ball & Stick. Add a distance measure (in Å units). Some facts on L-phenylalanine. Abbreviation: Phe. One-letter code: F, as in "Fenylalanine". Molecular mass: 165 daltons. Side chain (or R-group) features: Structural formula: Formula: -CH2-phenyl; Category: hydrophobic; aromatic. pKa: none. Return to image of Phe.
Some facts on L-phenylalanine.