glutamates patch

Dear Modellers,

I have to patch two glutamates to form a carboxyl-carboxylate pair. I thought it was sufficient to add at the end of my input the ad hoc version of the subroutine 'special_patches', ------------------------- SUBROUTINE ROUTINE = 'special_patches' PATCH RESIDUE_TYPE = 'GLUP', RESIDUE_IDS = '72' '282'

RETURN END_SUBROUTINE ------------------------- but it doesn't work. My approach was probably too naive. Do you have suggestions?

Thanks in advance