Single-letter side-chain codes

This is a list of extended single-letter amino-acid sidechain codes recognized by pmlbeta

Letter Side-chain
A alanine
C cysteine (neutral)
CM cysteine (anionic)
D aspartate (ionic)
DH aspartic acid (protonated)
E glutamate (ionic)
EH glutamic acid (protonated)
G glycine (i.e. no side-chain)
HD histidine protonated on Nδ
HE histidine protonated on Nε
HH doubly protonated histidine
H unprotonated histidine
I isoleucine
K lysine (charged)
KN lysine (neutral)
L leucine
M methionine
N asparagine
O ornithine (charged)
ON ornithine (neutral)
P proline (only alpha-amino acid)
Q glutamine
R arginine
S serine
T threonine
V valine
W tryptophan
Y tyrosine