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Cell Surface Characteristics of Bacteriophage-Resistant Lactococcus lactis subsp. cremoris SK110 and Its
L Sijtsma1, N Jansen, W C Hazeleger
1Biotechnology Center, Laboratory of Microbiology, University of Amsterdam, Nieuwe Achtergracht 127, 1018 WS Amsterdam, The Netherlands.
Abstract:
Several cell surface characteristics of bacteriophage-resistant Lactococcus lactis subsp. cremoris SK110 were compared with those of its phage-sensitive derivative SK112. After centrifugation, SK110 cells resisted suspension more strongly than SK112 cells. SK112 was more negatively charged and had a more hydrophobic cell surface than SK110. Furthermore, SK112 was agglutinated in the presence of concanavalin A, whereas SK110 was not. The opposite was observed upon incubation of cells of either strain with a lectin from Ricinus communis. A mild alkali treatment decreased the differences in the cell surface characteristics of the two strains remarkably.
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