Spacefill model of L-phenylalanine (F)







Some facts on L-phenylalanine.

1. Abbreviation: Phe.
2. One-letter code: F, as in "Fenylalanine".
3. Molecular mass: 165 daltons.
4. Side-chain (or R-group) features:
   • Formula: -CH₂-phenyl;
   • Category: Very hydrophobic;
   • pK_a: none.

Return to image of Phe.







Stick model of L-tyrosine (Y)
Back to Question 1.








Some facts on L-tyrosine.

1. Abbreviation: Tyr.
2. One-letter code: Y, as in "tYrosine".
3. Molecular mass: 181 daltons.
4. Side-chain (or R-group) features:
   • Formula: -CH₂-phenyl-OH;
   • Category: Hydrophobic;
   • pK_a: 9.7.
     (to produce a phenolate anion)

Return to image of Tyr.

---

Last modified August 1, 1996