Amino Acids in Proteins

Arginine (Positive)

Arg; R

Histidine (Positive)

His; H

Lysine (Positive)

Lys; K

Aspartic acid (Negative)

Asp; D

Glutamic acid (Negative)

Glu; E

Serine (Polar but uncharged side chains aka hydrophilic)

Ser; S

Threonine (Polar but uncharged side chains aka hydrophilic)

Thr; T

Asparagine (Polar but uncharged side chains aka hydrophilic)

Asn; N

Glutamine (Polar but uncharged side chains aka hydrophilic)

Gln; Q

Tyrosine (Polar but uncharged side chains aka hydrophilic)

Tyr; Y

Cysteine (Special case)

Cys; C

Glycine (Special case)

Gly; G

Proline (Special case)

Pro; P

Alanine (Nonpolar hydrophobic side chains)

Ala; A

Isoleucine (Nonpolar hydrophobic side chains)

lle; l

Leucine (Nonpolar hydrophobic side chains)

Leu; L

Methionine (Nonpolar hydrophobic side chains)

Met; M

Phenylalanine (Nonpolar hydrophobic side chains)

Phe; F

Tryptophan (Nonpolar hydrophobic side chains)

Trp; W

Valine (Nonpolar hydrophobic side chains)

Val; V