Classification of Amino Acids

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Q. Indicate each of the following for the amino acid shown:

a. name, three-letter, and one-letter abbreviations
b. polar or nonpolar
c. has a neutral, acidic, or basic R group
d. interaction with water as hydrophobic or hydrophilic

Amino acids are classified using their specific R groups. The
nonpolar (hydrophobic) amino acids have hydrogen, alkyl, or aromatic R groups.
polar amino acids have R groups that interact with water, which makes them hydrophilic.
polar neutral amino acids contain an hydroxyl (— OH), a thiol (— SH), or an amide (— CONH2) R group
polar acidic amino acids contain a carboxylate (— COO−) R group.
polar basic amino acids contain an ammonium(— NH3+) R group.