Urea has been found to enhance to quantity of TCA-soluble fragments in
azocasein assays of cathepsin L activity (typically 3M urea). That's the
only one I know of.
--
_______________________________________________________________________________
Lou Hom >K '93 "America has given the Negro people a bad
lhom at nature.berkeley.edu check, a check which has come back marked
http://www.ocf.berkeley.edu/~lhom 'insufficient funds'." -- MLK
