Introduction to Protein Structure
threonine/thr/T = -CH-(CH3)(OH)
aspartate/asp/D = -CH2-COO(-)
glutamate/glu/E = -CH2-CH2-COO(-)
aspargine/asn/N = -CH2-CONH2
glutamine/gln/Q = -CH2-CH2-CONH2
lysine/lys/K = -CH2- CH2- CH2- CH2-NH3(+)
arginine/arg/R = - CH2- CH2- CH2-NH-C-(NH2)(NH2)(+)