Milne, Margaret (University of Adelaide, Adelaide, Australia), and F. M. Collins. Heat-labile antigens of Salmonella enteritidis. I. Extraction of antigens. J. Bacteriol. 92:543-548. 1966.-Salmonella enteritidis strains of high and low mouse virulence were grown in continuous culture. Cell walls were obtained from both strains by sonic disruption, and the washed walls were extracted at 4 C with...

A leucyl, phenylalanyl transfer RNA-protein transferase has been purified nearly 300-fold from the 105,000 X g supernatant fraction of Escherichia coIi. The procedure consists of extraction of the precipitate formed with protamine sulfate, gel filtration on Sephadex G-100 and Sephadex G-75, and chromatography on diethylaminoethyl cellulose. The enzyme preparation specifically catalyzes the tran...

The presence of a new lactate dehydrogenase inhibitor on the trailing edge of the NADH peak from chromatography on diethylaminoethyl-celluose [Loshon et al., Clin. Chem., this issue] was verified. It was resolved from the NADH by high-performance liquid chromatography on muBondapak C18. When the new inhibitor was present in a reaction mixture to the extent that, of the initial 260-nm absorbance...

Culture fluids from five muminesarcomas were chemotac tic for syngeneic penitoneal macnophages in vitro. Penito neal macmophages from mice infected with Mycobacterium bovis, strain Bacillus Ca!mette-Guérin,were more respon sive to the chemotactic factor in tumor cultures than were normal macnophages. Penitoneal gran ulocytes, however, did not significantly respond to this factor. The level of ...

1. Factor VII, essentially free of Factor X but containing traces of prothrombin, and Factor X, very low in Factor VII, have been prepared by a combination of adsorption to and elution from barium sulfate and chromatography on diethylaminoethyl cellulose. 2. The activation of Factor X by lung microsomes is due to contamination of Factor X with Factor VII rather than to a direct attack on the Fa...

Two immunologically reactive polysaccharides have been isolated from the cell walls and from culture filtrates of a filamentous alpha-hemolytic streptococcus provisionally designated capsular type 83. Both polysaccharides were purified by diethylaminoethyl-cellulose chromatography. Analysis indicates that the capsular polysaccharide consists of galactose and phosphorus, whereas the cell wall po...

A simple rapid immunochemical procedure has been developed which provides information about the qualitative and quantitative nature of antigens. It involves the use of purified radioactive ((125)I-labeled) antibodies. The amount of antibody bound to the antigen is determined by filtering the mixture through diethylaminoethyl (DEAE)-cellulose paper. All of the antigen, as well as the antibody co...

Succinate dehydrogenase (succinate: phenazine methosulfate oxidoreductase, EC 13.99.1) activity in crude mitochondrial fraction from pea (var. Alaska) cotyledons increased during seed imbibition to reach a maximum after about 12 hours. The increase was not inhibited by either cycloheximide or D(-)dweo-chloramphenicol. The postmicrosomal fraction from dry cotyledons, but not that from fully imbi...

Relatively simple and rapid procedures are described for the large-scale preparation of liver membranes that contain virtually all of the high affinity insulin-binding activity of liver homogenates. The presumed insulin recepotr, which is extracted from these membranes in soluble form with Triton X-100, can be further purified by ammonium sulfate fractionation (3-fold purification) or by diethy...