Amino Acids Grouped by Their Side Chain Properties

Table 9.1 Amino Acids Grouped by Their Side Chain Properties Nonpolar side chains: Have no charged or electronegative atoms at pH 7.0 to form hydrogen bonds. Alanine (Ala or A) Methionine (Met or M) Cysteine (Cys or C) Phenylalanine (Phe or F) ”$983276;BTéTWWWM'F'r—JEBETEFS“SPF; MMMMMMM m Isoleucine (He or I) Tryptophan (Trp or W) Leucine (Leu or L) Valine (Val or V) Polar side chains: Have partial charges at pH 7.0 and can form hydrogen bonds. Asparagine (Asp or N) Threonine (Thr or T) Glutamine (Glu or Q) Tyrosine (Tyr or Y) Serine (Ser or S) Electrically charged side chains: At pH 7.0, can form hydrogen and ionic bonds. Basic Side Chains Acidic Side Chains Arginine (Arg or R) Aspartate (Asp or D) Histidine (His or H) Glutamate (Glu or E) Lysine (Lys or K)