e., 50, 10, 1.0, and 0.5 mM for glucose and fructose, 10,

1.0, 0.5, and 0.1 mM for sucrose, and 10, 5.0, 1.0, and 0.5 mM for galactose), and used these solutions to construct standard curves for each sugar component. These standard curves were then used to estimate the concentrations of the different components in the JBOVS from the HSQC spectra using the same NMR measurement conditions. The following acquisition NMR parameters were used for the quantification HSQC measurements: the size of fid was 1024 data points in F2 (1H) and 240 data points in F1 (13C), with 40 scans and an interscan delay (D1) of 1.5 s with 16 dummy scans; the transmitter frequency offset was 4.708 ppm in F2

(1H) and 75.5 ppm in F1 PS-341 purchase (13C) with spectral widths of 14 and 59 ppm in F2 (1H) and F1 (13C), respectively. For the construction of the standard curves, only signals with a coefficient of determination (R2) greater than 0.999 HDAC inhibitor were selected for each sugar component. Using the resulting standard curves, the sugar concentration estimates were calculated by averaging each signal (excluding any overlapping signals) as well as the standard deviations. Bacterial cell pellets of the collected samples from in vitro experiments and the fecal samples from in vivo experiments were suspended in TE buffer (10 mM Tris–HCl, 1 mM EDTA, pH 8.0). Then, the samples were homogenised and disrupted with 0.1 mm Zirconia/Silica Beads (BioSpec Products, Inc., OK, USA) and extracted with 10% sodium dodecyl sulphate (SDS)/TE solutions. After centrifugation at 20,000g for 10 min at room temperature, the DNA was purified using a phenol/chloroform/isoamyl alcohol (25:24:1) solution and precipitated by adding ethanol and sodium acetate, and then stored at −20 °C. For PCR-DGGE analyses, PCR amplification

and DGGE analysis were performed according to previous studies (Date et al., 2010). The gels obtained from DGGE were stained using SYBR Green I (Lonza, Rockland, ME USA) and were acquired by GelDoc XR (Bio-Rad Laboratories Inc., Tokyo, Japan). For identification C-X-C chemokine receptor type 7 (CXCR-7) of the bacterial origin of DNA sequences in the gel, selected DGGE bands were excised from the original gels and their DNA fragments were reamplified with the corresponding primers. The obtained PCR product was sequenced using a DNA Sequencer (Applied Biosystems 3130xl Genetic Analyzer) with a BigDye Terminator v3.1 Cycle Sequencing Kit (Applied Biosystems Japan Ltd., Tokyo, Japan). The sequences were submitted to BLAST search programs at the DNA Data Bank of Japan (DDBJ) to determine their closest relatives. The sequences determined in this study and those retrieved from the databases were aligned using CLUSTAL W, and then a phylogenetic tree was constructed with CLUSTAL W and Tree View by the neighbour-joining method.