This document provides information about bacterial transposons. It defines key terms like transposons, transposase, and IS elements. It describes the two types of bacterial transposons: composite mobile genetic elements and non-composite mobile genetic elements. Composite transposons are flanked by IS elements, while non-composite transposons lack flanking IS sequences but have inverted repeats. The mechanisms of transposition, including replicative and non-replicative, are explained. General transposon structure and mechanisms of movement are illustrated.