An enzyme which catalyzes sulfhydryl-disulfide interchange in proteins containing “incorrect” disulfide bonds has been isolated from beef liver microsomes. The purified form of this enzyme shows two bands upon electrophoresis in starch gels and polyacrylamide gels. The proteins represented by these bands are considered to be variants of the same protein because both are enzymically active after...

INTRODUCTION The analysis of polyacrylamide gels is currently carried out manually or automatically. In the automatic method, there are limitations related to the acceptable degree of distortion of lane and band continuity. The available software cannot deal satisfactorily with this type of situations. Therefore, the paper presents an original image analysis method devoid of the aforementioned ...

Group A streptococcal pyrogenic exotoxin (SPE) type C was partially purified by differential solubility in ethanol and acetate-buffered saline. Toxin prepared in this way consisted of protein and hyaluronic acid. After removal of hyaluronic acid, the toxin remained pyrogenic, enhanced susceptibility of rabbits to letahl endotoxin shock, was stable when treated with acid, base, or pepsin, but wa...

RNase E is a major endonucleolytic RNA processing enzyme in Escherichia coli. We have sequenced a 3.2 kb EcoRI-BamHI fragment encoding the rne gene, and identified its reading frame. Upstream from the gene, there are appropriate consensus sequences for a putative promoter and a ribosome binding site. We have translated this gene using a T7 RNA polymerase/promoter system. We determined 25 amino ...

The mRNA for preuteroglobin, a precursor of the hormonally induced protein uteroglobin, has been partially purified from the endometrium of progesterone treated rabbits. The purification procedure starts with total endometrial polysomes and involves treatment with proteinase K and dodecylsulfate, chromatography on oligo(dT)-cellulose, sucrose density gradient centrifugation, electrophoresis in ...

Analysis of the maize chloroplast DNA-dependent RNA polymerase by electrophoresis on polyacrylamide gels that contain sodium dodecyl sulfate shows that the enzyme is multimeric. It contains at least two polypeptides of 180,000 and 140,000 daltons. Polypeptides of lower molecular mass that are associated with the enzyme at several stages of purification may also be subunits of the enzyme. Electr...

Sons, 1989:3.2. 5. Chomczynski P, Sacchi H. Single-step method of RNA isolation by acid guanidinum thiocyanate-phenol-chloroform extraction. Anal Biochem 1987; 162:156–9. 6. Bauer D, Warthoe P, Rohde M, Strauss M. Detection and differential display of expressed genes by DDRT-PCR. PCR Methods Appl 1994;4:S97–108. 7. Bassam B, Caetano-Anolles G, Gresshoff P. Fast and sensitive silver staining of ...

Histones were extracted from frog livers and testes and analyzed by electrophoresis on long polyacrylamide gels and on sodium dodecyl sulfate (SDS)-containing polyacrylamide gels. Frog histones were found to be similar to those of calf thymus except that frog histone fraction F2A2 showed a marked dependence on the temperature at which the long gels were run, and frog histone fraction F3 could b...

The five mycobacteria Mycobacterium lepraemurium, M. leprae, M. bovis BCG, M. smegmatis, and M. intracellulare were studied. Catalase and peroxidase activities were demonstrated in polyacrylamide and crossed immunoelectrophoresis gels for M. lepraemurium, M. intracellulare, and BCG, but not for M. leprae. Peroxidase and catalase activities were associated with the same precipitate line in cross...

The classic silver staining method for detecting bacterial lipopolysaccharides (LPSs) in polyacrylamide gels (C. Tsai and C. E. Frasch, Anal. Biochem. 119:115-119, 1982) was at least 20 times more sensitive than the modified silver staining method (A. Fomsgaard, M. A. Freudenberg, and C. Galanos, J. Clin. Microbiol. 28:2627-2631, 1990) for detecting LPS from the bacterium Moraxella osloensis. H...