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THE LS-ANTIGEN OF VACCINIA : III. PHYSICAL-CHEMICAL PROPERTIES OF LS-ANTIGEN AND SOME OF ITS DEGRADATION PRODUCTS

Authors
Journal
Journal of Experimental Medicine
0022-1007
Publisher
The Rockefeller University Press
Publication Date
Keywords
  • Article
Disciplines
  • Biology

Abstract

Studies on LS-protein, the soluble double antigen of vaccinia, and on the degradation products L'S and L''S' have been made with electrophoresis and in the analytical ultracentrifuge. LS, which is homogeneous electrically and in the ultracentrifuge, has an isoelectric point at pH 4.8. At 4°C. its partial specific volume is 0.72 cc./gm., and its diffusion constant is 1.50 x 10–7 cm.2/sec. The sedimentation constant is 6.35 at 20°C., the molecular weight is 214,000, and the molecule appears to have an elongated ellipsoidal shape with an axis ratio of 1:20. L'S and L''S' are homogeneous electrically but not in the ultracentrifuge, L''S' being extremely polydisperse.

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