title: Basis of transposition and gene amplification by Tn1721 and related tetracycline-resistance transposons.
mesh_terms: D004251:DNA Transposable Elements; D004926:Escherichia coli / Q000235:genetics; D005784:Gene Amplification; D008628:Mercury / Q000494:pharmacology*; D008854:Microscopy, Electron; D011815:R Factors; D011995:Recombination, Genetic; D012091:Repetitive Sequences, Nucleic Acid; D013752:Tetracycline / Q000494:pharmacology*
chemical_list: D004251:DNA Transposable Elements; D013752:Tetracycline; D008628:Mercury