biochem
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Chapter 2: Protein Structure - Chemistry
The polar, hydrophilic amino acids can be subdivided into three major classes, the polar uncharged-, the acidic-, and the basic- functional groups. Within the polar uncharged class, the side chains contain heteroatoms (O, S, or N) that are capable of forming permanent dipoles within the R-group. These include the hydroxyl- and sulfoxyl-containing amino acids, serine, threonine, and cysteine, and the amide-containing amino acids, glutamine and asparigine. Two amino acids, glutamic acid (glutamate
