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mitoxpress xtra oxygen-sensitive fluorescent probe  (Agilent technologies)


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    Agilent technologies mitoxpress xtra oxygen-sensitive fluorescent probe
    seNOS-derived NO 2 − activates respiration to sustain growth . A. Aerobic growth of the WT and Δ nos mutant was measured spectrophotometrically (OD 600 ) following incubation at 37 °C and 250 rpm. B. The glucose, ( C ) lactate and ( D ) acetate concentrations were determined from culture supernatants at the indicated times (mean ± SD, n = 3). E. The intracellular redox ratio (NADH/NAD + ) was measured during the exponential growth phase of strains (mean ± SD, n = 3, Student's t -test; *** P ≤ 0.0005). F. Gentamicin susceptibility assay. The ratio of the area under the growth curve (AUC) of cultures challenged with 2 μg/ml gentamicin relative to cultures grown in the absence of antibiotic (referred here as relative growth) was determined as the measure of gentamicin sensitivity of bacterial strains (mean ± SD, n = 3, Two-way ANOVA with Sidak's post-comparison test; * P ≤ 0.05). The Δ qox mutant (cytochrome oxidase mutant) with impaired respiration was included as a positive control in the assay. NaNO 2 concentration, 1 mM. G. Oxygen consumption was determined by measuring the time-resolved fluorescence of the oxygen-sensitive probe <t>(MitoXpress,</t> Luxcell Biosciences) in cultures supplemented with or without 1 mM NaNO 2 (mean ± SD, n = 3, Two -way ANOVA with Sidak's post-comparison test; **** P ≤ 0.00005). H. Nitrite levels were determined using the Griess assay. The rate of nitrite production was estimated from the total nitrite accumulated in culture supernatants between 3.5 h and 24 h of growth and normalized to the time and OD 600 (mean ± SD, n = 3, Student's t -test; **** P ≤ 0.00005). I. The growth profile of the Δ nos mutant was determined in cultures containing either 1 mM NaNO 3 , 1 mM NaNO 2 or 10 mM NH 4 Cl. Values represent mean ± SD (n = 3).
    Mitoxpress Xtra Oxygen Sensitive Fluorescent Probe, supplied by Agilent technologies, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/mitoxpress+probe/pmc10594633-336-11-17
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    Images

    1) Product Images from "A critical role for staphylococcal nitric oxide synthase in controlling flavohemoglobin toxicity"

    Article Title: A critical role for staphylococcal nitric oxide synthase in controlling flavohemoglobin toxicity

    Journal: Redox Biology

    doi: 10.1016/j.redox.2023.102935

    seNOS-derived NO 2 − activates respiration to sustain growth . A. Aerobic growth of the WT and Δ nos mutant was measured spectrophotometrically (OD 600 ) following incubation at 37 °C and 250 rpm. B. The glucose, ( C ) lactate and ( D ) acetate concentrations were determined from culture supernatants at the indicated times (mean ± SD, n = 3). E. The intracellular redox ratio (NADH/NAD + ) was measured during the exponential growth phase of strains (mean ± SD, n = 3, Student's t -test; *** P ≤ 0.0005). F. Gentamicin susceptibility assay. The ratio of the area under the growth curve (AUC) of cultures challenged with 2 μg/ml gentamicin relative to cultures grown in the absence of antibiotic (referred here as relative growth) was determined as the measure of gentamicin sensitivity of bacterial strains (mean ± SD, n = 3, Two-way ANOVA with Sidak's post-comparison test; * P ≤ 0.05). The Δ qox mutant (cytochrome oxidase mutant) with impaired respiration was included as a positive control in the assay. NaNO 2 concentration, 1 mM. G. Oxygen consumption was determined by measuring the time-resolved fluorescence of the oxygen-sensitive probe (MitoXpress, Luxcell Biosciences) in cultures supplemented with or without 1 mM NaNO 2 (mean ± SD, n = 3, Two -way ANOVA with Sidak's post-comparison test; **** P ≤ 0.00005). H. Nitrite levels were determined using the Griess assay. The rate of nitrite production was estimated from the total nitrite accumulated in culture supernatants between 3.5 h and 24 h of growth and normalized to the time and OD 600 (mean ± SD, n = 3, Student's t -test; **** P ≤ 0.00005). I. The growth profile of the Δ nos mutant was determined in cultures containing either 1 mM NaNO 3 , 1 mM NaNO 2 or 10 mM NH 4 Cl. Values represent mean ± SD (n = 3).
    Figure Legend Snippet: seNOS-derived NO 2 − activates respiration to sustain growth . A. Aerobic growth of the WT and Δ nos mutant was measured spectrophotometrically (OD 600 ) following incubation at 37 °C and 250 rpm. B. The glucose, ( C ) lactate and ( D ) acetate concentrations were determined from culture supernatants at the indicated times (mean ± SD, n = 3). E. The intracellular redox ratio (NADH/NAD + ) was measured during the exponential growth phase of strains (mean ± SD, n = 3, Student's t -test; *** P ≤ 0.0005). F. Gentamicin susceptibility assay. The ratio of the area under the growth curve (AUC) of cultures challenged with 2 μg/ml gentamicin relative to cultures grown in the absence of antibiotic (referred here as relative growth) was determined as the measure of gentamicin sensitivity of bacterial strains (mean ± SD, n = 3, Two-way ANOVA with Sidak's post-comparison test; * P ≤ 0.05). The Δ qox mutant (cytochrome oxidase mutant) with impaired respiration was included as a positive control in the assay. NaNO 2 concentration, 1 mM. G. Oxygen consumption was determined by measuring the time-resolved fluorescence of the oxygen-sensitive probe (MitoXpress, Luxcell Biosciences) in cultures supplemented with or without 1 mM NaNO 2 (mean ± SD, n = 3, Two -way ANOVA with Sidak's post-comparison test; **** P ≤ 0.00005). H. Nitrite levels were determined using the Griess assay. The rate of nitrite production was estimated from the total nitrite accumulated in culture supernatants between 3.5 h and 24 h of growth and normalized to the time and OD 600 (mean ± SD, n = 3, Student's t -test; **** P ≤ 0.00005). I. The growth profile of the Δ nos mutant was determined in cultures containing either 1 mM NaNO 3 , 1 mM NaNO 2 or 10 mM NH 4 Cl. Values represent mean ± SD (n = 3).

    Techniques Used: Derivative Assay, Mutagenesis, Incubation, Drug Susceptibility Assay, Comparison, Positive Control, Concentration Assay, Fluorescence, Griess Assay

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    Fluorescence:

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    Electron Paramagnetic Resonance:

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    Incubation:

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    seNOS-derived NO 2 − activates respiration to sustain growth . A. Aerobic growth of the WT and Δ nos mutant was measured spectrophotometrically (OD 600 ) following incubation at 37 °C and 250 rpm. B. The glucose, ( C ) lactate and ( D ) acetate concentrations were determined from culture supernatants at the indicated times (mean ± SD, n = 3). E. The intracellular redox ratio (NADH/NAD + ) was measured during the exponential growth phase of strains (mean ± SD, n = 3, Student's t -test; *** P ≤ 0.0005). F. Gentamicin susceptibility assay. The ratio of the area under the growth curve (AUC) of cultures challenged with 2 μg/ml gentamicin relative to cultures grown in the absence of antibiotic (referred here as relative growth) was determined as the measure of gentamicin sensitivity of bacterial strains (mean ± SD, n = 3, Two-way ANOVA with Sidak's post-comparison test; * P ≤ 0.05). The Δ qox mutant (cytochrome oxidase mutant) with impaired respiration was included as a positive control in the assay. NaNO 2 concentration, 1 mM. G. Oxygen consumption was determined by measuring the time-resolved fluorescence of the oxygen-sensitive probe (MitoXpress, Luxcell Biosciences) in cultures supplemented with or without 1 mM NaNO 2 (mean ± SD, n = 3, Two -way ANOVA with Sidak's post-comparison test; **** P ≤ 0.00005). H. Nitrite levels were determined using the Griess assay. The rate of nitrite production was estimated from the total nitrite accumulated in culture supernatants between 3.5 h and 24 h of growth and normalized to the time and OD 600 (mean ± SD, n = 3, Student's t -test; **** P ≤ 0.00005). I. The growth profile of the Δ nos mutant was determined in cultures containing either 1 mM NaNO 3 , 1 mM NaNO 2 or 10 mM NH 4 Cl. Values represent mean ± SD (n = 3).

    Journal: Redox Biology

    Article Title: A critical role for staphylococcal nitric oxide synthase in controlling flavohemoglobin toxicity

    doi: 10.1016/j.redox.2023.102935

    Figure Lengend Snippet: seNOS-derived NO 2 − activates respiration to sustain growth . A. Aerobic growth of the WT and Δ nos mutant was measured spectrophotometrically (OD 600 ) following incubation at 37 °C and 250 rpm. B. The glucose, ( C ) lactate and ( D ) acetate concentrations were determined from culture supernatants at the indicated times (mean ± SD, n = 3). E. The intracellular redox ratio (NADH/NAD + ) was measured during the exponential growth phase of strains (mean ± SD, n = 3, Student's t -test; *** P ≤ 0.0005). F. Gentamicin susceptibility assay. The ratio of the area under the growth curve (AUC) of cultures challenged with 2 μg/ml gentamicin relative to cultures grown in the absence of antibiotic (referred here as relative growth) was determined as the measure of gentamicin sensitivity of bacterial strains (mean ± SD, n = 3, Two-way ANOVA with Sidak's post-comparison test; * P ≤ 0.05). The Δ qox mutant (cytochrome oxidase mutant) with impaired respiration was included as a positive control in the assay. NaNO 2 concentration, 1 mM. G. Oxygen consumption was determined by measuring the time-resolved fluorescence of the oxygen-sensitive probe (MitoXpress, Luxcell Biosciences) in cultures supplemented with or without 1 mM NaNO 2 (mean ± SD, n = 3, Two -way ANOVA with Sidak's post-comparison test; **** P ≤ 0.00005). H. Nitrite levels were determined using the Griess assay. The rate of nitrite production was estimated from the total nitrite accumulated in culture supernatants between 3.5 h and 24 h of growth and normalized to the time and OD 600 (mean ± SD, n = 3, Student's t -test; **** P ≤ 0.00005). I. The growth profile of the Δ nos mutant was determined in cultures containing either 1 mM NaNO 3 , 1 mM NaNO 2 or 10 mM NH 4 Cl. Values represent mean ± SD (n = 3).

    Article Snippet: To determine the oxygen consumption rates of the various strains, a MitoXpress Xtra oxygen-sensitive fluorescent probe from Agilent (#MX-200-4) was used following the manufacturer's instructions.

    Techniques: Derivative Assay, Mutagenesis, Incubation, Drug Susceptibility Assay, Comparison, Positive Control, Concentration Assay, Fluorescence, Griess Assay