From: Marc S. Lewis <mslewis@helix.nih.gov>
  To  : Borries Demeler <demeler@bioc09.v19.uthscsa.edu>
  Date: Mon, 18 Jun 2001 08:45:19 -0400

Re: RNAse contamination in AUC CP's

Bo -

I forgot to mention that the NaOH - HNO3 treatment might remove the
orientation mark on the face of the window - therefore, mark this location
on the ground edge of the window with a soft lead pencil before treating
the windows.  I think that 2 hours each in the alkali and acid should be
enough when followed by overnight in methanol.

Best regards -

Marc
Marc S. Lewis, Ph. D., Chief
Molecular Interactions Resource
Division of Bioengineering and Physical Science
Office of Research Services
National Institutes of Health
Buiding 13  Room 3N17
13 South Drive  MSC 5766
BETHESDA MD 20892-5766

Phone: 301-496-9044;  Fax:  301-496-6608