*** For details on how to be removed from this list visit the *** *** CCP4 home page http://www.dl.ac.uk/CCP/CCP4/main.html *** Sorry to post this here, but could somone help me on this. How do you collect a low-temperature dataset with a deoxyhemoglobin crystal without exposing the crystal to atmospheric air. Thank you. Martin Safo, Ph.D