* protein selection definition
*

define prot sele ( segid  prot) end
define memb sele ( segid memb ) end
define ions sele ( segid ions ) end
define pept sele ( segid  pep*) end
define protmemb sele ( segid  prot .OR. segid  memb) end
define water sele  (resname TIP3 ) end
define trace sele ( type ca ) end  ! usefull for MINI 
define back sele ( type n .or. type ca .or. type c ) end
define main sele ( type n .or. type ca .or. type c .or. type o .or. type ha* .or. type hn ) end
define side sele ( (.not. main) ) end

