question about patch

Date: Thu Mar 24 2005 - 09:33:04 CST

Dear all,

I was trying to patch PRES SAHC to RES ADE. The command I use in pgn file
is: "patch SAHC A1:1" (connect the PRES to one atom in RES ADE).

It generated the correct structure (pdb file is fine). I checked psf file,
the atom and bond parts are correct. But the rest (ie angles, dihedrals,
impropers) are all missing the patched residue part (SAHC).

Does anyone know why this error is happening?

BTW, the ff I am using is Charmm.

Thanks a lot!


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