The article on analytical ultracentrifugation (Franklin Hoke, The Scientist, Nov. 9, 1992, page 18) was well-written and informative but had one omission. It did not mention the National Analytical Ultracentrifugation Facility, which is part of the Biotechnology Center at the University of Connecticut. This facility was set up by an initial grant from the National Science Foundation in 1988. The principal investigators are Emory H. Braswell, Todd M. Schuster, and David A. Yphantis. The facility is staffed with two master's-level scientists and one master's- level engineer.
In addition to the new Beckman XLA, the facility maintains four model E instruments equipped with advanced electronics and cells developed at the facility, increasing the efficiency of the technique more than 20-fold. Although it has been suggested that we are maintaining the most complete working museum of Model Es in the world, for some studies the Model E has not yet been...
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