Solvent corrections - a bit more history

["Prof. Simon EV Phillips" <sevp@bmb.leeds.ac.uk>]

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As a contribution to the recent discussions on solvent correction, 
these arguments are anything but new. I published a mask-based 
correction for myoglobin in in JMB 142, 531-554, 1980 which referred 
back to a Babinet type approach published by Fraser et al (1978). 
Interesting old papers by Bragg and Perutz allude to this issue too 
with a nice one in 1952. Other corrections had been made by Bob Stroud 
for trypsin in the same era.

 Dirk Kostrewa's article in the CCP4 newsletter unfortunately fails to 
refer to any of this previous work, which is correctly referenced in 
some, but not all, of the various refinement programs documentation.

Simon Phillips

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