Select amino acid(s) by residue number

Type the sequence number of the single amino acid you wish to select or the range of amino acids (for example 121-123), then press Enter/Return.
The display will zoom in on the amino acid(s) you have selected and they will be shown in ball-and stick representation using the color scheme shown below. Element Color Scheme (CPK)
Carbon
Nitrogen
Oxygen
Sulfur

Note that hydrogen atoms are not shown.