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Biomedical subjects

L Döhner

Publications and source records attributed to L Döhner.

At least 55 records · Page 3Linked to original sources
PubMed1978

[Differentiation of structural viral proteins using pyrolysis gas chromatography].

Types 1, 2, and 5 of structural proteins of adenovirus as well as human albumin, pepsin, trypsin, and ribonuclease tend to exhibit characteristic substance patterns when exposed to pyrolysis-gas chromatography. Those patterns may be helpful in differentiating between those proteins. The presence of a distributional pattern is assumed to depend, in most cases, not only on the given amino acid composition, but also on the amino acid sequence of the protein proper. Samples of complex composition, such as complete viruses or allantois fluids, were much less suitable for differentiation by means of pyrolysis-gas chromatography.

Adenoviridae↗
PubMed1978

[Demonstration of IgM antibodies in influenza virus infections].

Forty-Four sera of patients with confirmed influenza-A infection were titrated in parallel with and without 2-mercaptoethanic treatment against influenza-A by means of passive haemagglutination. Reduction of titre by at least two levels was detectable in 21 cases. Gradient centrifugation was additionally undertaken of 23 patient sera and three serum samples obtained from intact probands who had produced a titre against influenza-A in passive haemagglutination. Antibody against influenza-A was present in both the IgM and IgG fractions of the patients' serum samples. Yet, in the three control sera of intact probands antibody against influenza-A was recordable only from the IgG fraction. IgM antibody could not be detected by 2-mercaptoethanoic treatment alone unless the 7s-antibody portion in a given serum sample was smaller than the 19s-antibody portion.

Antibodies, Viral↗
PubMed1978

[Differentiation of matrix proteins of influenza A viruses using enzyme immunoassay].

Matrix protein is known as a type-specific structural protein of influenza viruses. An attempt has been made to find out whether or not strain-specific components could be detected from matrix protein, in addition to its type-specific antigen determinants. The technique of enzyme immune assay was chosen as the optional method to differentiate between matrix proteins of various influenza-A viruses. Antigen titration was undertaken of several matrix proteins, using two specific anti-matrix-protein sera in each case. Information regarding serological relationships between the tested matrix proteins of various influenza-A viruses was obtained from a quotient between the titres of one antigen, on the one hand, and the two anti-matrix-protein sera used in titration, on the other. Two matrix protein sub-types were established in the context of the influenza-A viruses tested. Sub-type M1 was attributable to older strains (A/PR/8 and A/FM/1), whereas the matrix protein of sub-type M2 was found to be present in more recent strains (A/Hongkong and A/Port Chalmers).

Antigens, Viral↗
PubMed1978

[Antigenic composition of adenovirus hexons].

Quantitative relations between the group-specific and the type-specific components of the hexons of adenovirus type 2 and 5 were studied by means of FITC-conjugated Fab-fragments of antibodies directed against type 2 and type 5 hexons. From the sedimentation constant of the complexes of hexons and Fab in the region of excess of Fab we conclude that there are at least 20 determinants on the hexon. Half of these are type-specific and the others are group-specific. Both components of the type 2 hexon consist of equal parts of carbodiimide sensitive and carbodiimide resistent determinants.

Adenoviruses, Human↗