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The Journal of Immunology, 1972, 109: 434-438.
Copyright © 1972 by The American Association of Immunologists, Inc.
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Immune Hemolysis and the Functional Properties of the Second (C2) and Fourth (C4) Components of Complement

IV. Formation of EAC42 by Treatment of C2 with Trypsin in the Presence of EAC4

Michael Loos1, Tibor Borsos and Herbert J. Rapp

From the Institute of Medical Microbiology, J. Gutenberg University, Mainz, West Germany and the Biology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20014

Abstract

Treatment of guinea pig or human C2 with trypsin in the presence of EAC4 leads to the formation of EAC
Figure 1
. The kinetics of EAC
Figure 2
generation, the nature of the C2 dose response curve and the nature of the decay curve of SA
Figure 3
all indicated that EAC
Figure 4
formed by the action of trypsin on C2 are not distinguishable from EAC
Figure 5
generated by the interaction of EAC14 and C2. The data support the hypothesis that C1 is a trypsin-like enzyme.

Footnotes

1 Guest worker in the Biology Branch, National Cancer Institute. Supported by the Deutsche Forschungsgemeinschaft, Lo. 188/1.






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