Amino Acids

Arg (Arginine/R)

positively charged side chain

basic

His (Histidine/H)

positively charged side chain

basic

Lys (Lysine/K)

positively charged side chain

basic

Asp (Aspartic Acid/D)

negatively charged side chain

acidic

Glu (Glutamic Acid/E)

negatively charged side chain

acidic

Ser (Serine/S)

polar uncharged side chain

Thr (Threonine/T)

polar uncharged side chain

Asn (Asparagine/N)

polar uncharged side chain

Gln (Glutamine/Q)

polar uncharged side chain

Cys (Cysteine/C)

Contains sulfur, Can create S=S

(Disulfide Bonds)

Sec (Selenocysteine/U)

Not a "typical" amino acid, contains Selenium

Gly (Glycine/G)

nonpolar

Pro (Proline/P)

heterocyclic

Ala (Alanine/A)

hydrophobic side chain

nonpolar

Val (Valine/V)

hydrophobic side chain

nonpolar

Ile (Isoleucine/I)

hydrophobic side chain

nonpolar

Leu (Leucine/L)

hydrophobic side chain

nonpolar

Met (Methionine/M)

hydrophobic side chain

Phe (Phenylalanine/F)

hydrophobic side chain

Aromatic

Tyr (Tyrosine/Y)

hydrophobic side chain

Aromatic

Trp (Tryptophan/W)

hydrophobic side chain

Aromatic

Essential Amino acids

histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine

start codon

AUG

codes for Methionine (Met/M)