Before revision: Overview EssentialConditionally essential Non-essential Histidine (H) Arginine (R) Alanine (A) Isoleucine (I)Cysteine (C) Aspartic acid (D) Leucine (L)Glutamine (Q) Asparagine (N) Lysine (K)Glycine (G) Glutamic acid (E) Methionine (M)Proline (P) Serine (S) Phenylalanine (F)Tyrosine (Y) Selenocysteine (U) Threonine (T)Pyrrolysine* (O) Tryptophan (W) Valine (V) (*) Pyrrolysine, sometimes considered the "22nd amino acid", is not used by the human body.
After revision: Overview EssentialConditionally essential Non-essential Histidine (H) Argizine (R) Alanine (A) Isoleucine (I)Cysteine (C) Aspartic acid (D) Leucine (L)Glutamine (Q) Asparagine (N) Lysine (K)Glycine (G) Glutamic acid (E) Methionine (M)Proline (P) Serine (S) Phenylalanine (F)Tyrosine (Y) Selenocysteine (U) Threonine (T)Pyrrolysine* (O) Tryptophan (W) Valine (V) (*) Pyrrolysine, sometimes considered the "22nd amino acid", is not used by the human body.