OK. Which? ReferencesThere have been some in the recent literature. I'm not going to look them up for you but, if you are interested, you could do a search using keywords "intron" and "prokaryote". LOL. Hint: try PNAS
PS, by the way, this is the Pub Med url
http://www.ncbi.nlm.nih.gov/PubMed/
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