0 software [28], which is available online (http://​tools.​neb.​com/​NEBcutter2/​index.​php). Experimental validation of the selected enzymes was carried out following the manufacturers’ instructions, under the conditions described above. Acknowledgments The authors thank Dr. Maqsudul Alam (University of Hawaii, Manoa, HI),

selleck Dr. Kurt Houf (Ghent University, Belgium), Dr. Nalini Chinivasagam (Animal Research Institute, Queensland, Australia) and Dr. Robert Madden (Queen’s University Belfast, Ireland) for kindly providing Arcobacter strains. AL is thankful to Universitat Rovira i Virgili for a doctoral grant and to CONICYT, Chile, for financial support through Becas Chile. This work was supported in part by the project with reference AGL2011-30461-C02-02 from the Ministerio de Ciencia e Innovación (Spain). Electronic supplementary material Additional file 1: Table S1. Computer simulated profiles of Arcobacter spp. 16S rRNA gene (1026 bp) digestion with MseI endonuclease. Species with specific RFLP patterns are in bold. (DOC

80 KB) Additional file 4: Figure S1. Microheterogeneities (or mutations) in the 16S rRNA gene of seven atypical A. cryaerophilus A-1210477 chemical structure strains in relation to the type strain (LMG 9904T), strain LMG 10829 (A. cryaerophilus subgroup 1B) and the type strain ofA. butzleri (LMG 10828T). Sequence alignment of the 16S rRNA gene (positions 190–207 in relation to Escherichia coli) of seven atypical A. cryaerophilus MCC950 in vitro strains showing mutations at positions 192 (T→C) and 205 (A→G), which alter the MseI restriction enzyme recognition site (TTAA). IUPAC code, Y = Pyrimidine (C or T); R = Purine (A or G). (DOC 34 KB) Additional file 5: Figure S2. Agarose gel (3.5%) comparing the 16S rRNA-RFLP patterns obtained using endonucleases a\) TasI and b) MnlI for species A. butzleri , A. thereius and A. trophiarum. Lanes 1 and 14, 50 bp ladder (Fermentas); 2, A. butzleri LMG 10828T; 3, A. butzleri F42;

4, A. butzleri F43; 5, A. butzleri F44; 6, A. butzleri F50; 7, A. butzleri LMG 11118; 8, A. Inositol monophosphatase 1 thereius LMG 24486T; 9, A. thereius SW24; 10, A. thereius F89-4; 11, A.thereius F93-4 y 12, A.thereius LMG 24487; 13, A. trophiarum CECT 7650 (identical pattern to that of the 11 atypical strains of A. cryaerophilus, Additional file 2: Table S2). MnlI was selected because it produced more distinctive patterns among the species than TasI. (DOC 310 KB) Additional file 2: Table S2. Computer simulated profiles of Arcobacter spp.16S rRNA gene (1026 bp) digestion with MnlI endonuclease. Species in bold are those that show a specific RFLP pattern that was not distinguished with MseI. (DOC 72 KB) Additional file 3: Table S3. Computer simulated profiles of Arcobacter spp. 16S rRNA gene (1026 bp) digestion with BfaI endonuclease. Species in bold are those that now show a specific RFLP pattern that was not distinguished previously with MseI or MnlI. (DOC 61 KB) References 1.