Could somebody tell me how to get my hands on a strain or plasmid which contains transposon Tn916? I like to use this E. faecalis transposon for insertional mutagenesis in a compatible strain. My E-mail address is: PTJ.Willemsen.omb.acta at med.vu.nl -- P.T.J. Willemsen Dept. Oral Microbiology Free University Amsterdam The Netherlands