Group II Introns: Mobile Ribozymes that Invade DNA

Alan M. Lambowitz1 and Steven Zimmerly2 Institute for Cellular and Molecular Biology, Department of Chemistry and Biochemistry, and Section of Molecular Genetics and Microbiology, School of Biological Sciences, University of Texas at Austin, Austin, Texas 78712 Department of Biological Sciences, University of Calgary, Calgary, Alberta T2N 1N4, Canada Correspondence: lambowitz{at}mail.utexas.edu