amino acids

Lysine

Glycine

Alanine

Valine

Cysteine

Proline

Leucine

Isoleucine

Methionine

Tryptophan

Phenylalanine

Arginine

Histidine

Serine

Threonine

Tyrosine

Asparagine

Glutamine

Aspartic acid

Glutamic acid

Glycine

SC: Hydrogen atom

Alanine

SC: Methyl group

Valine

SC: Isopropyl group

Cysteine

SC: -thiol group where S atom can form disulfide bonds with other cysteine residues

Proline

SC: Pyrrolidine ring (side chain curls back and bonds with N atom itself, forming a ring structure)

Leucine

SC: Isobutyl group

Isoleucine

SC: Four-carbon aliphatic chain with a methyl group at c2

Methionine

SC: S-methyl thioether

Tryptophan

SC: Indole group (benzene ring fused to pyrrole ring with N atom)

Phenylalanine

SC: Phenyl group

Serine

SC: Hydroxyl group bonded to alpha carbon of the amino acid

Threonine

SC: Hydroxyl group attached to beta carbon

Asparagine

SC: Carboxamide group (this functional group consists of a carbonyl group bonded to an amine group)

Glutamine

SC: Carbamoyl group (simple amide functional group)

Lysine

SC: Four-carbon aliphatic chain ending with an amine group

Arginine

SC: Guanidinium group (terminal end of the chain is capped with a guanidino group that contains 3 N atoms arranged in planar fashion

Histidine

SC: Imidazole ring (5 membered aromatic ring)

Aspartic acid

CH2COOH side chain where carboxylic group is attached to C2 of the side chain

Glutamic acid (Glutamate)

Five-carbon chain with carboxylic group at the end

Tyrosine

SC: Phenol group with a hydroxyl group attached to one of the carbon atoms in the ring