Nisin Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R22:Gesundheitssch?dlich beim Verschlucken.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-S?tze Betriebsanweisung:
S22:Staub nicht einatmen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Chemische Eigenschaften
Crystals from ethanol. Derived from
Streptococcus lactis Lancefield Group N.
Verwenden
Nisin is an antimicrobial agent derived from pure culture fermenta-
tions of certain strains of streptococcus lactis lancefield group n.
nisin preparation contains nisin, a group of related peptides with
antibiotic activity. it is used to inhibit the outgrowth of clostridium
botulinum spores and toxin formation in pasteurized cheese spreads
and pasteurized process cheese spreads; pasteurized cheese spread
with fruits, vegetables, or meats; and pasteurized process cheese
spread with fruits, vegetables, or meats.
Definition
ChEBI: A type-A lantibiotic containing 34 amino acid residues (including lanthionine (Lan), methyllanthionine (MeLan), didehydroalanine (Dha) and didehydroaminobutyric acid (Dhb)) and five thioether bridges. It is obtained by fermentation of the bacterium L
ctococcus lactis and shows particular activity against Clostridium botulinum. It is used in the production of various processed foods to suppress Gram-positive spoilage and pathogenic bacteria and so extend shelf life.
Nebenwirkungen
Although Nisin E234 generally regarded as a very safe and effective supplement, there can be some minor side effects. Possible side effects: pruritus, nausea, and flushing. Other side effects include: pruritus, skin rash, and vomiting.
l?uterung methode
This polypeptide from S. lactis is purified by crystallisation from 80% (v/v) EtOH and by countercurrent distribution. The synthetic polypeptide antibiotic can also be purified by preparative HPLC and assayed by HPLC on a Nucleosil 3007C18 (6 x 250mm) column using a MeCN—0.01M HCl gradient (30-50%), at 2%/minute, and flow rate of 1.5mL/minute to give a retention time of 8.1 minutes; or MeCN—0.3M guanidine-HCl gradient (30-50%), at 2%/minute, and flow rate of 1.5ml/minute to give a retention time of 10.9minutes. FAB-MS gave the pseudomolecular ion m/z at 3352.7 (M + H)+. It is soluble in dilute acid and is stable even on boiling. [Berridge et al. Biochem J 52 529 1952, synthesis by Fukase et al. Tetrahedron Lett 29 795 1988.]
Nisin Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
