RESIDUE word [real] [ADJUST]
The RESIDUE is used to start a new residue. If another residue has already been specified, then it is completed. The word in the command specifies the residue name, and the optional real number specifies the total electrostatic charge of the residue. If no total charge is specified, then 0.0 is assumed. If ADJUST is specified, then the charges of all the atoms will be adjusted by the following formula:
total - sum q_i --------------- N
where N is number of atoms in the residue.