From: Micheal Jacobsen <jacobsen@biosci.uq.edu.au>
  To  : rasmb@bbri.harvard.edu
  Date: Thu, 24 Oct 1996 13:03:31 +1000

DMSO

If your proteins are relatively scarce you can determine a buoyancy
correction term for each as opposed to vbar measurements using a procedure
detailed in

Biochemistry 35 (40), 13173-13179, 1996

This can also which can be found directly at

http://pubs.acs.org/journals/bichaw.html via Netscape

for those not needing the exercise

Hope this is of some help