! acc.edp   by X. Cai Zhang, 000602
! calculate solvent accessible surface area of a given residue in the context
!  of the protein, but excluding solvent molecules.
! syntax: 
! @acc.edp residueId ligandToBeExcluded
! example:
! @acc A64 'BME NAG'

initialize ; naybr 7. $(p1) 
exclude residue sol wat tip $(p2) 
! it is okay if the above listed molecules do not exist
group bg

initialize ; zone $(p1) ; access bg 1.4 0.2 
list
! the occ field is the solvent accessible surface for each listed atoms