Über Antigenstrukturen von permanenten Zellstämmen

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Abstract
Using the complement fixation test, we found three different antigenic components in established cell strains originating from man and mouse: 1. the antigenic property of the original species specifity. It resides in cell substances which, in a serological sense, are haptenes. 2. an acquired antigenic property of species specifity of beef, which is a haptene too. The cells acquired this antigenic component from substances in the culture medium containing 20% of calf serum. 3. an antigenic property characterized as a complete antigen which, probably, was acquired by the cells only during their in vitro-life. The nature of this third antigen is not yet entirely clear.