Le kit d’analyse du lysozyme EnzChek™ fournit aux chercheurs un dosage simple et sensible pour mesurer l’activité du lysozyme enAfficher plus
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Référence
Quantité
E22013
400 dosages
Référence E22013
Prix (EUR)
648,00
Each
Ajouter au panier
Quantité:
400 dosages
Prix (EUR)
648,00
Each
Ajouter au panier
Le kit d’analyse du lysozyme EnzChek™ fournit aux chercheurs un dosage simple et sensible pour mesurer l’activité du lysozyme en solution. L’augmentation de la fluorescence résultant de l’activité des lysozymes est mesurée à l’aide d’un lecteur de microplaques fluorométrique ou à fluorescence.
• Détectez les niveaux d’activité du lysozyme aussi bas que 20 U/ml • Utilisez les paramètres standard d’excitation/émission de fluorescéine (FITC) • Le format permet la mesure continue de l’activité lysozymique
Le dosage utilise une approche innovante pour mesurer l’activité lysozymique. Les parois cellulaires de Micrococcus lysodeikticus sont utilisées qui ont été abondamment marquées avec de la fluorescéine, ce qui provoque le sillon du signal de fluorescence. L’enzyme lysozyme active hydrolyse les liens b-(1 -4)-glucosidiques entre l’acide N-acétylmuramique et les résidus de N-acétyl-D-glucosamine dans la paroi cellulaire du mucopolysaccharide, ce qui permet de soulager le piégeage et d’obtenir une augmentation spectaculaire de la fluorescence proportionnelle à l’activité du lysozyme.
Usage exclusivement réservé à la recherche. Ne pas utiliser pour des procédures de diagnostic.
Spécifications
Méthode de détectionIntensité de fluorescence
Quantité400 dosages
Conditions d’expéditionTempérature ambiante
Propriétés du substratSubstrat à base de lipides
Type de substratSubstrat de lysozyme
Enzyme cibleLysozyme
À utiliser avec (application)Dosage du lysozyme
À utiliser avec (équipement)Lecteur de microplaques à fluorescence
Gamme de produitsEnzChek
Type de produitDosage du lysozyme
Unit SizeEach
Contenu et stockage
Stocker au congélateur (entre -5°C et -30°C) à l’abri de la lumière.
Foire aux questions (FAQ)
How can I limit signal saturation when using the EnzChek Lysozyme Assay Kit (Cat. No. E22013)?
To limit signal saturation when using the EnzChek Lysozyme Assay Kit (Cat. No. E22013), try lowering the voltage (gain) on the PMT (photomultiplier tube). If you are still seeing signal saturation after lowering the voltage, try a shorter reaction time, and/or lower substrate concentration.
May other buffers be used for the EnzChek Lysozyme assay?
Yes. You may use other buffers that are compatible with the enzyme of interest. The buffer provided is optimal for use with chicken egg white lysozyme. If the buffer has a pH <6, adjust the pH to 7.5 to 8 prior to detection for optimal signal from the fluorescein. The emission of fluorescein drops off at pH <6.
Vogesella mureinivorans sp. nov., a peptidoglycan-degrading bacterium from lake water.
Authors:Jørgensen NO, Brandt KK, Nybroe O, Hansen M,
Journal:Int J Syst Evol Microbiol
PubMed ID:19946047
'A novel, non-pigmented, rod-shaped, Gram-negative strain was isolated from mesotrophic lake water in Zealand, Denmark. Phylogenetic analysis of the 16S rRNA gene sequence of the bacterium, designated strain 389(T), indicated that the strain belonged to the genus Vogesella and formed a monophyletic group with Vogesella perlucida DS-28(T) (99.1?% nucleotide similarity); ... More
Structure-function analysis of HsiF, a gp25-like component of the type VI secretion system, in Pseudomonas aeruginosa.
Authors:Lossi NS, Dajani R, Freemont P, Filloux A,
Journal:Microbiology
PubMed ID:21873404
'Bacterial pathogens use a range of protein secretion systems to colonize their host. One recent addition to this arsenal is the type VI secretion system (T6SS), which is found in many Gram-negative bacteria. The T6SS involves 12-15 components, including a ClpV-like AAA(+) ATPase. Moreover, the VgrG and Hcp components have ... More
Mechanisms of systemic vasodilation by lysozyme-c in septic shock.
In septic shock (SS), cardiovascular collapse is caused by the release of inflammatory mediators. We previously found that lysozyme-c (Lzm-S), released from leukocytes, contributed to systemic vasodilation in a canine model of SS. We then delineated the pathway by which this occurs in a canine carotid artery organ bath preparation ... More
Mutations of the Listeria monocytogenes peptidoglycan N-deacetylase and O-acetylase result in enhanced lysozyme sensitivity, bacteriolysis, and hyperinduction of innate immune pathways.
Authors:Rae CS, Geissler A, Adamson PC, Portnoy DA,
Journal:Infect Immun
PubMed ID:21768286
Listeria monocytogenes is a Gram-positive intracellular pathogen that is naturally resistant to lysozyme. Recently, it was shown that peptidoglycan modification by N-deacetylation or O-acetylation confers resistance to lysozyme in various Gram-positive bacteria, including L. monocytogenes. L. monocytogenes peptidoglycan is deacetylated by the action of N-acetylglucosamine deacetylase (Pgd) and acetylated by ... More
Alcohol use disorders affect antimicrobial proteins and anti-pneumococcal activity in epithelial lining fluid obtained via bronchoalveolar lavage.
Authors:Burnham EL, Gaydos J, Hess E, House R, Cooper J,
Journal:Alcohol Alcohol
PubMed ID:20729531
Our overall objective was to examine whether characteristics of epithelial lining fluid (ELF) from subjects with alcohol use disorders (AUDs) obtained via bronchoalveolar lavage (BAL) contribute to their predisposition to pneumococcal pneumonia. We sought to compare the anti-pneumococcal activity of acellular human BAL from subjects with AUDs to matched controls. ... More