Amino Acid Structures + Structures

Arginine (Arg; R)

Histidine (His; H)

Lysine (Lys; K)

Aspartic Acid (Asp; D)

Glutamic Acid (Glu; E)

Serine (Ser; S)

Threonine (Thr; T)

Asparagine (Asn; N)

Glutamine (Gln; Q)

Tyrosine (Tyr; Y)

Alanine (Ala; A)

Isoleucine (Ile; I)

Leucine (Leu; L)

Methionine (Met; M)

Phenylalanine (Phe; F)

Tryptophan (Trp; W)

Valine (Val; V)

Cysteine (Cys; C)

Glycine (Gly; G)

Proline (Pro; P)

Primary Structure

structure that determines linear sequence and has peptide bonds (N→ C terminus)

Secondary Structure

structure where protein begins to fold with hydrogen bonds (e.g. alpha helix + beta pleated sheet from polypeptide chains)

Tertiary Structure

3D structure of a protein with V.D.W., ionic, hydrogen bonds and disulfide bridges; interactions between R groups of same polypeptide chain

Quaternary Structure

structure made up of subunits of polypeptide chains formers dimers (2), trimers (3), tetramers (4)