1 RESUBMITTED – JUNE 6, 2000 Metabolite profiling of sesquiterpene lactones from Lactuca species: major latex components are novel oxalate and sulfate conjugates of lactucin and its derivatives. Reuben A. Sessa * , Mark H. Bennett * , Mervyn J. Lewis§, John W. Mansfield ¶ and Michael H. Beale§ ¶ . From the Department of Biological Sciences, Wye College, University of London, Ashford, Kent. TN25 5AH, UK and §IACR-Long Ashton Research Station, Department of Agricultural Sciences, University of Bristol, Long Ashton, Bristol, BS41 9AF, UK. Running Title:- Sesquiterpene lactone conjugates in Lactuca * Joint first authors ¶ To whom correspondence should be addressed at Dept. Biological Sciences, Wye College, University of London, Ashford, Kent TN25 5AH, UK. Tel 44-1233-812401; Fax 44-1233-813140; E-mail J.Mansfield@wye.ac.uk, or at IACR-Long Ashton Research Station, University of Bristol, Long Ashton, Bristol, BS41 9AF, UK. Tel. 44-1275-549289; Fax. 44-1275-394281; E-mail: mike.beale@bbsrc.ac.uk JBC Papers in Press. Published on June 16, 2000 as Manuscript M000244200 by guest on June 8, 2020 http://www.jbc.org/ Downloaded from