Biochemical and immunochemical study of a protein preparation from the culture liquid ofYersinia pseudotuberculosis

Using ultrafiltration methods of isolation, a culture liquid ofY. pseudotuberculosis has yielded a protein fraction with a molecular mass of not less than 80–100 kDa which possesses hemagglutinating activity and the properties of an antireceptor. It has been shown for the first time by the methods of affinity chromatography, indirect hemagglutination, and indirect IEA that this protein preparation from aY. pseudotuberculosis culture interacts specifically with the Fab₂ fragment of normal human IgG.Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Division of the Russian Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 784–787, November–December, 1994.