There is a little problem here.  The ASN residues which are not glycosylation sites have both HD21 and HD22.  If I simply replace HD22 with HD21, those ASN residues will have two HD21 atoms. So it is more complicated than one line sed script.

Jianghai

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Jianghai Zhu, Ph.D
CBR Institute for Biomedical Research
Department of Pathology
Harvard Medical School
200 Longwood Ave., Boston, MA 02115
Ph: 617-278-3211
Fx: 618-278-3232
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On Oct 7, 2007, at 12:20 PM, Ralf W. Grosse-Kunstleve wrote:

Thanks for reporting this problem!
While we work on a fix, you can easily patch your PDB files like this:

  sed 's/HD22 ASN/HD21 ASN/' good.pdb > better.pdb

Ralf