Transposition protein of Tn3: identification and characterisation of an essential represser-controlled gene product

Abstract
Fusions that bring lac gene expression under the control of transcriptional and translational signals within the Tn3 element were used to identify and characterize a Tn3-encoded transposase (Tnp) peptide of MW 100,000 essential for transposition [in Escherichia coli]. The gene specifying this product is regulated by the Tn3 repressor protein and is part of a bidirectional genetic unit that includes the repressor gene.