Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!cica!gatech!ncar!boulder!eesnyder From: eesnyder@boulder.Colorado.EDU (Eric E. Snyder) Newsgroups: sci.bio Subject: GGR expression in tryptophan auxotroph media Message-ID: <10756@boulder.Colorado.EDU> Date: 14 Aug 89 21:45:37 GMT Sender: news@boulder.Colorado.EDU Reply-To: eesnyder@boulder.Colorado.EDU (Eric E. Snyder) Organization: University of Colorado, Boulder Lines: 16 I am currently trying to express a mutant _E. coli._ galactose receptor in a derivative of pUC19 in tryptophan auxotroph media for 19F-trp labeling for NMR. Unfortunately, our new mutants (all trp -> tyr) are not being expressed in our usual M9 + casamino acids media. All our other mutants grow well in LB and express GGR as well as the wild-type plasmid. Any ideas??? ------------------------------------------------------------------------- AAGGTGCAATGATGAGGAATTTTATCGTAGTTATGAATAATCCTGCAAGAGGTGCAAAACCCAGAGTACCTCA Eric E. Snyder Department of Molecular, I thought it was rain for a minute; Cellular and Developmental Biology I thought the game had been called. University of Colorado, Boulder TTCCACGTTACTACTCCTTAAAATAGCATCAATACTTATTAGGACGTTCTCCACGTTTTGGGTCTCATGGAGT -------------------------------------------------------------------------