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Quantitative studies on the group-specific substances in human blood and saliva. I. Group-specific substance B



Quantitative studies on the group-specific substances in human blood and saliva. I. Group-specific substance B



Jour Immunol 41(4): 413-428



A technic is described for standardizing isoagglutinating sera to be used for estimating the conc, of group-substances in blood and secretions. When the maximal dilution of blood or saliva that neutralized the isoagglutinating serum or serum-dilution is plotted against serum-dilution, the curves for saliva and blood are quite different. This makes it difficult to determine the relative amounts of group-substances in blood and saliva. The cause for the difference in the curves is presumably related to the intrinsic difference in the test-methods for blood and secretions, namely, the absorptive and inhibitive technics, respectively. The expts. described for the standardization of sera were performed with the blood and saliva of a single group B individual. Anti-B sera from various sources gave quite different findings, so that it was not possible to predict the results merely from the conc, of agglutinins in the serum or serum-dilution. In the absorptive tests the blood of different group-B individuals was found to give equivalent results whether they were secretors or non-secretors. Moreover, the saliva of different group-B secretors, or of the same group-B individual at different times, was relatively constant in its content of group-specific substance. Saliva is a particularly favorable material for use as a basis for standardization of quantitative studies on group-specific substances.

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