Copyright information:Taken from "Identification to the species level of isolated in probiotic prospecting studies of human, animal or food origin by 16S-23S rRNA restriction profiling"BMC Microbiology 2005;5():15-15.Published online 23 Mar 2005PMCID:PMC1079852.Copyright © 2005 Moreira et al; licensee BioMed Central Ltd. Plus and minus signs mean positive or negative cleavage of long, medium or short PCR amplicon, respectively. GibcoBRL 1 kb DNA ladder was used for sizing DNA fragments and molecular masses are shown at right in bp.