Here's a reference for you, J Bacteriol 1995 Jul;177(14):3897-903, Prokaryotic introns and inteins: a panoply of form and function. Belfort M, Reaban ME, Coetzee T, Dalgaard JZ. Molecular Genetics Program, Wadsworth Center and School of Public Health, State University of New York at Albany 12201-2002, USA.
JB is online at jb.asm.org
Thanks! And here's one for you:
Dai L, Zimmerly S. Compilation and analysis of group II intron insertions in bacterial genomes: evidence for retroelement behavior. Nucleic Acids Res. 2002 Mar 1;30(5):1091-102.