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Biomedical subjects

W F GOEBEL

Publications and source records attributed to W F GOEBEL.

23 records · Page 2Linked to original sources

The chemical and antiviral properties of the somatic antigen of Phase II Shigella sonnei.

1. The somatic antigen of Phase II Shigella sonnei can be isolated by extracting phenol-killed microorganisms with water. This substance inactivates all T phages to which this bacillus is susceptible. 2. The Phase II antigen is constituted from a protein and a phosphorylated lipocarbohydrate. The major portion of the protein component can be removed by digestion with pancreatin. The enzymatically degraded antigen thus obtained can be further dissociated into its protein and lipocarbohydrate components by treatment with 90 per cent phenol. Glucose, galactose, glucosamine, and an aldoheptose have been identified as the monosaccharide constituents of the lipocarbohydrate.

Antigens↗

On the nature of the toxic component of the somatic antigen of Shigella paradysenteriae type Z (Flexner).

From the chemical evidence presented it appears that the toxicity associated with the somatic antigen of Type Z Sh. paradysenteriae may be attributed to an entity distinct from the known components of the complex. That this substance is neither the protein, the lipid, nor the carbohydrate component of the antigen is evident. Because of its lability to chemical manipulation, the nature of the toxic component, has not yet been ascertained.

Antibodies↗

Studies on bacteriophage. II. Inhibition of lysis of Escherichia coli B by the somatic antigen of Phase II Shigella sonnei.

By serological means it has been shown that E. coli B contains an antigen closely related to the protein-lipocarbohydrate complex of Phase II Sh. sonnei. Lysis of E. coli B by three of the T viruses, T(3), T(4), and T(7), can be inhibited by the Phase II dysentery antigen. It has been suggested that the receptor of E. coli B with which these viruses combine is this newly described antigenic component. Two variants of the virus T(3) have also been described, in stocks which have been treated with the Phase II antigen. One of these variants infects both Phase II Sh. sonnei and E. coli B, and the other infects only the latter microorganism; neither of the two variants is inhibited by concentrations of the Phase II antigen of 1 mg. per cc. The distinctive properties of the variants are not hereditary.

Bacteriophages↗