Negations

GSL allows you to exclude certain atoms from your selection using negation operators.

• Syntax:

  not <query>
  

  Or:

  ! <query>
  

• Examples:

  not name CA
  

  Selects all atoms not named CA.

  ! name CA
  

  Equivalent to the above.

  not resname POPE POPG
  

  Selects atoms not in residues named POPE or POPG.

  !Protein
  

  Selects atoms not in the group named "Protein".