Forty-four Thai isolates phenotypically assigned to the genus Gluconobacter were examined for 16S-23S rDNA ITS restriction analysis by MboII and SduI ( Bsp1286I) digestions. The Thai isolates tested were divided into seven groups: Group I for fourteen isolates, Group IX for one isolate, Group X for two isolates, Group V-2 for four isolates, Group XI for three isolates, Group IV for one isolate,...

The low molecular weight RNA species which have been purified and characterized in this laboratory (T.S. Ro-Choi and H. Busch (1974) in The Cell Nucleus, Vol. 3, pp 151-208; Academic Press, New York) are now of interest because of their suggested role in processing of heterogeneous nuclear RNAs (Lerner, M.R., Boyle, J.A., Mount, S.M., Wolin, S.L., and Steitz, J.A. (1980) Nature, 283, 220-224). ...

Escherichia coli strains causing human extra-intestinal infections may be divided into two groups, B1 and B2 according to the electrophoretic patterns of carboxylesterase B. This study compares the restriction fragment length polymorphism (RFLP) of ribosomal DNA (rDNA) for 45 B1 strains and 45 B2 strains to examine the genetic structure of B2 strains and to distinguish them from B1 strains. The...

Inactivation of intact influenza viruses using formaldehyde or β-propiolactone (BPL) is essential for vaccine production and safety. The extent of chemical modifications of such reagents on viral proteins needs to be extensively investigated to better control the reactions and quality of vaccines. We have evaluated the effect of BPL inactivation on two candidate re-assortant vaccines (NIBRG-121...

Database searching is a main method for protein identification in shotgun proteomics, and till now most research effort is dedicated to improve its effectiveness. However, the efficiency of database searching is facing a serious challenge, due to the ever fast increasing of protein and peptide databases resulting from genome translations, enzymatic digestions, and post-translational modificatio...

The nucleosome, the fundamental structural unit of chromatin, contains an octamer of core histones H3, H4, H2A, and H2B. Incorporation of histone variants alters the functional properties of chromatin. To understand the global dynamics of chromatin structure and function, analysis of histone variants incorporated into the nucleosome and their covalent modifications is required. Here we report t...

BACKGROUND Urease B is an important virulence factor that is required for Helicobacter pylori to colonise the gastric mucosa. Mouse monoclonal antibodies (mAbs) that inhibit urease B enzymatic activity will be useful as vaccines for the prevention and treatment of H. pylori infection. Here, we produced murine mAbs against urease B that neutralize the enzyme's activity. We mapped their epitopes ...