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  • 1990-1994  (2)
  • 1
    Digitale Medien
    Digitale Medien
    Caseicin 80: purification and characterization of a new bacteriocin from Lactobacillus casei (1990)
    Springer
    Archives of microbiology 154 (1990), S. 249-252 
    Details
    ISSN: 1432-072X
    Schlagwort(e): Lactic acid bacteria ; Lactobacillus casei ; Bacteriocin ; Extra- and intracellular polypeptides
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract When grown in complex or synthetic media, Lactobacillus casei B 80 synthesizes a mitomycin C-inducible polypeptide with very specific bactericidal activity against the sensitive strain Lactobacillus casei B 109. The amount of secreted bacteriocin in the culture solution was low, about 1 mg/l. The bacteriocin which we called caseicin 80, was also detectable in cell extracts, although only 2% of the total activity was retained intracellularly. Caseicin 80 was concentrated by ultrafiltration and purified by cation exchange chromatography with Cellulose SE-23 and Superose. The molecular weight was in the range of M r=40,000–42,000 and the isoelectric point was pH 4.5.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00248963
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Killer toxin of Hanseniaspora uvarum (1990)
    Springer
    Archives of microbiology 154 (1990), S. 175-178 
    Details
    ISSN: 1432-072X
    Schlagwort(e): Killer toxin ; Hanseniaspora uvarum ; Yeast
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The yeast Hanseniaspora uvarum liberates a killer toxin lethal to sensitive strains of the species Saccharomyces cerevisiae. Secretion of this killer toxin was inhibited by tunicamycin, an inhibitor of N-glycosylation, although the mature killer protein did not show any detectable carbohydrate structures. Culture supernatants of the killer strain were concentrated by ultrafiltration and the extracellular killer toxin was precipitated with ethanol and purified by ion exchange chromatography. SDS-PAGE of the electrophoretically homogenous killer protein indicated an apparent molecular mass of 18,000. Additional investigations of the primary toxin binding sites within the cell wall of sensitive yeast strains showed that the killer toxin of Hanseniaspora uvarum is bound by β-1, 6-d-glucans.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00423329
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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    Artikel (Nationallizenzen)
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