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首页> 外文期刊>Infection and immunity >Extracellular Antigens from Listeria monocytogenes I. Purification and Resolution of Hemolytic and Lipolytic Antigens from Culture Filtrates of Listeria monocytogenes
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Extracellular Antigens from Listeria monocytogenes I. Purification and Resolution of Hemolytic and Lipolytic Antigens from Culture Filtrates of Listeria monocytogenes

机译:单核细胞增生李斯特菌的细胞外抗原I.单核细胞增生李斯特菌培养物滤液的溶血和脂解抗原的纯化和分离

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Two antigens were purified from culture filtrates of Listeria monocytogenes 7973 by the following procedure: (i) acid precipitation with 4 n HCl at pH 3.7, (ii) Sephadex G-75 column fractionation, (iii) diethylaminoethyl-Sephadex A50 batchwise adsorption, and (iv) rechromatography on Sephadex G-75. This procedure resulted in the resolution of two distinct antigens. One antigen, designated a hemolytic antigen because of its ability to lyse erythrocytes from a variety of species, had a specific activity of 25,000 units/mg of protein and an estimated molecular weight of at least 171,000. The other antigen, designated a lipolytic antigen because of its ability to hydrolyze egg yolk saline substrate, had a specific activity of 400 units/mg of protein and an estimated molecular weight of 52,500.
机译:通过以下步骤从单核细胞增生性李斯特菌 7973的培养液中纯化出两种抗原:(i)用4 n HCl在 p H 3.7酸沉淀,(ii)Sephadex G- 75柱分馏,(iii)二乙基氨基乙基-Sephadex A50分批吸附,和(iv)在Sephadex G-75上进行重层析。该过程导致两种不同抗原的分离。一种抗原,由于其能够溶解多种物种的红细胞的能力而被称为溶血性抗原,其比活性为25,000单位/毫克蛋白质,估计分子量至少为171,000。另一种由于其能够水解蛋黄盐水底物的能力而称为脂解性抗原,其比活性为400单位/毫克蛋白质,估计分子量为52,500。

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