On Wed, 15 Dec 1999 kathy_hicks_at_opr-2@smtp.mcis.uchicago.edu wrote:

> Can someone e-mail some information to me regarding where the best
> place for ordering Protargol would be?  I have been told it would be
> in Europe.

  The Biological Stain Commission has been certifying silver
  proteinates (with a preferred name of protargol-S) for about
  20 years. Any American vendor of certified stains should have
  an independently evaluated product in its catalog.

  There are plenty of silver methods for axons that use only
  silver nitrate and other simple, pure compounds much cheaper
  than protargol. Some of these simpler methods are also more
  specific for axons. (Protargol methods stain cell nuclei too.)

 John A. Kiernan,
 Department of Anatomy & Cell Biology,
 The University of Western Ontario,
 LONDON,  Canada  N6A 5C1