From owner-biophysics@net.bio.net Fri Mar 25 22:00:00 1994 Path: biosci!agate!usenet.ins.cwru.edu!cleveland.Freenet.Edu!bl275 From: bl275@cleveland.Freenet.Edu (Dan Diaz) Newsgroups: bionet.metabolic-reg,bionet.biophysics Subject: Anion stimulation of enzymes - physiological or niet? Date: 26 Mar 1994 05:14:46 GMT Organization: Case Western Reserve University, Cleveland, OH (USA) Lines: 5 Message-ID: <2n0gc6$n6u@usenet.INS.CWRU.Edu> Reply-To: bl275@cleveland.Freenet.Edu (Dan Diaz) NNTP-Posting-Host: eeyore.ins.cwru.edu Xref: biosci bionet.metabolic-reg:217 bionet.biophysics:144 i work with an e. coli exonuclease which is stimulated about ten-fold by 50 mM phosphate. this is hardly physiological. is the enzyme simply not as active in vivo as in test tubo? can other anions substitute in vivo? any suggestions for physiological anions to try in tubo? .