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Biomedical subjects

A Rackwitz

Publications and source records attributed to A Rackwitz.

18 recordsLinked to original sources
PubMed1988

Recombination within the class III region by a double cross over event.

Analysis of class I, class II, and class III gene products of the human MHC in a Caucasoid family with four children gave evidence for a double crossing over event in monozygotic twins between the C2, Bf/C4A, C4B gene loci. In view of the small genetic distance between C2 and C4, a point mutation within the Bf locus must be considered alternatively.

Crossing Over, Genetic↗
PubMed1977

[Secretory antibodies in saliva against group G streptococci (author's transl)].

Saliva of 310 persons were examined for their ability to agglutinate 33 streptococcal strains of the groups A-T. It was found that the saliva of persons with blood group O agglutinated significantly more often streptococci of strain G9 than the saliva of persons with blood group A (33.3%, and 18.75% resp., p less than 0.01). A statistical significant difference between persons of blood group B and O, or A and B did not exist. The agglutination reactions were caused probably by unspecific immunoglobulins because this strain G9 binds unspecifically human IgG. It is known, that some streptococcal strains of the groups A, B, C, D, and G contain receptors for the Fc-fragment of IgG and/or IgA. The results demonstrate that persons of the blood group O secrete more often immunoglobulin than those with blood group A.

Agglutination Tests↗