I go to tools and open the sequence of the protein that I am interested in.

The minimum number of amino acids in a row that I can select is 2.

I am interested in visualizing a selected number of amino acids that are not in linked to one  another.

Eg. A specific Lys residue in a helical sequence.

I have found a work  around. I highlight two adjacent residues, and visualize the two of  them as sticks. I  then select the amino acid I do not wish to highlight together with the amino acid on the other side of the one that  I am interested in. I can that way eventually deselect and not highlight the amino acid I am not interested  in. 

There has to be a simpler way.

Thanks for  your assistance.

Arthur G. Szabo

Professor Emeritus Chemistry

Wilfrid Laurier University.