1. Protein structure

Figure 2c: Chemical structure of the 20 amino acids (electrically charged)

Figure 2c: Chemical structure of the 20 amino acids (electrically charged)

1.1 Amino acids

Classification

Amino acids are classified according to the charge of their residue:

  • Basic amino acids (positively charged at a physiological pH)
    –NH2 group in the residue, ionised into –NH3 + at a cellular pH
    Lys, Arg, His