Abstract
Summary
1. From the stroma of beef erythrocytes it was possible to extract with boiling 80% alcohol the so-called heterogenetic “mononucleosis antigen,” which, after purification, inhibits the sheep cell agglutination of the infectious mononucleosis serum in a dilution of 1:2,400,000. It is a thermostable hapten and is not digested by pepsin or trypsin.
2. The “mononucleosis antigen” which occurs in sheep stroma cannot be extracted with good activity by means of the technic effective for beef cells.
3. A serologically similar heterogenetic antigen could also be detected in rabbit organs, although in small quantities. This fact makes it comprehensible why the corresponding antibody cannot be artificially produced in rabbits.
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