From: Ivan Gregoretti (ivangreg_at_gmail.com)
Date: Sat Feb 22 2014 - 17:29:35 CST

When running psfgen I get two complains for the "A" chain of 3GRW:

...
unknown residue type NAG
unknown residue type HOH
...
Info: generating structure...psfgen) unknown residue type NAG
failed!
ERROR: failed on end of segment
MOLECULE DESTROYED BY FATAL ERROR! Use resetpsf to start over.
...

Could anybody point me to a document to read and figure out a solution?

Thank you,

Ivan

Ivan Gregoretti, PhD
Bioinformatics