Dear all

I am starting to use Chimera as a master's student and I have some difficulties.

I know how to select the amino acids that are part of the surface of my protein. However, I don't know how to select the atoms of the surface. Specifically, the atoms accessible to the solvent.

My second question is:

I would like to know how polar amino acids (arginine, asparagine, aspartic acid, cysteine, etc.) and non-polar amino acids (alanine, glycine, isoleucine, leucine, etc.) can appear. Is there any configuration that allows me to identify polar and non-polar amino acids for edit them? Is it possible to customize those amino acids when I select them?

I would be grateful if someone could help me, thank you.

Best regards,

Susanna