Plasmid reference center registry of transposon (Tn) allocations through July 1981.

The criteria for transposable genetic elements (Cohen, 1976) were stated at the Cold Spring Harbor meeting in 1976 (Campbell et al., 1977) and defined and clarified further (Campbell et al., 1979). At that meeting the Plasmid Reference Center agreed to serve as a clearing house for continuous transposon registry. Interim lists have been previously published (Lederberg, 1978, 1980, Microbial Genetics Bulletin 44 : 31; ibid 48 : 90). A complete file of Tn elements is listed below.