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Fpquest

Manufactured by Bio-Rad
Sourced in United States

FPQuest is a software tool developed by Bio-Rad for the analysis and interpretation of data from fluorescence polarization (FP) experiments. It provides a platform for researchers to process, analyze, and visualize FP data, which is a widely used technique in various fields of study, including biochemistry, immunology, and drug discovery.

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6 protocols using fpquest

1

Genetic Relatedness of CPKP Isolates by PFGE

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The genetic relationship among the CPKP isolates was determined by PFGE according to standardized protocol [50 (link)] with the XbaI endonuclease (New England Biolabs, Beverly, MA, USA) by using a CHEF-DR III apparatus (Bio-Rad Laboratories Inc., Hercules, CA, USA) for the separation of DNA fragments. XbaI-digested DNA from Salmonella enterica serotype Braenderup H9812 was used as a reference size standard, while PFGE patterns were digitally analyzed using the FPQuest (Bio-Rad Laboratories Pty Ltd., Hercules, CA, USA) software package.
PFGE profiles were compared using the Dice correlation coefficient with a maximum position tolerance of 1.5% and an optimization of 1.5%. Similarity clustering analysis was performed by using the Unweighted Pair Group Method using Averages (UPGMA), and a dendrogram was generated. Two PFGE profiles were classified as indistinguishable if the DNA fragment patterns matched each other completely, while clusters were selected using a cutoff at the 80% level of genetic similarity.
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2

PFGE Analysis of Smal-Digested DNA

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The PFGE of SmaI-digested chromosomal DNA was performed as described previously 26 (link). PFGE patterns were compared using Bioinformatics FPQuest software version 4.0 software (BioRad, Hercules, CA, USA) and Dice correlation coefficients, with optimization and band position tolerance set at 1.0% and 2.3%, respectively 27 (link).
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3

Chromosomal DNA Electrophoresis Protocol

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Electrophoresis of chromosomal DNA was performed on all isolates as previously described, using a contour-clamped homogeneous electric field (CHED) DR III system [20 (link)]. Chromosomal patterns were examined visually, scanned with a Quantity One (Bio-Rad) and digitally analysed using FPQuest (Bio-Rad). S. aureus strain NCTC 8325 was used as a reference strain.
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4

Plasmid Isolation and Characterization

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Plasmid DNA was isolated from the wild-type strains and the TCs by both the Kado–Liu method (35 (link)) and Qiagen Plasmid Midikit (Qiagen, Germany). The extracted plasmid DNA was electrophoresed in 0.8% agarose gel at 70 V using 1× TBE running buffer and stained with ethidium bromide (0.5 g/mL). Plasmid sizing was done by FP-Quest (Bio-Rad, USA) software using E. coli V517 and Shigella flexneri YSH6000 as molecular weight markers. Replicon-typing PCR elucidated the plasmid incompatibility types (36 (link)).
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5

PFGE Analysis of Staphylococcus aureus

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PFGE analysis of S. aureus isolates was performed according to the PulseNet protocol [43 (link)] with the smaI enzyme (New England Biolabs, Beverly, MA, USA) by using a CHEF-DR III apparatus (Bio-Rad Laboratories Inc., Hercules, CA, USA) for the separation of DNA fragments. XbaI-digested DNA from Salmonella enterica serotype Braenderup H9812 was used as a reference size standard, while PFGE patterns were digitally analyzed using the FPQuest (Bio-Rad Laboratories Pty Ltd. Hercules, CA, USA) software package. PFGE profiles were compared using the Dice correlation coefficient, with a maximum position tolerance of 1.5% and optimization of 1.5%. Similarity, clustering analysis was performed using the unweighted pair group method using averages (UPGMA), and a dendrogram was generated. Two PFGE profiles were classified as indistinguishable if the DNA fragment patterns matched each other completely, while clusters were selected using a cutoff at the 75% level of genetic similarity. The discriminatory power of PFGE analysis was determined using Simpson’s index of discrimination (D), as previously described [44 (link)]. Values for D ranged between 0 and 1, with a value of 1 indicating the most discriminatory method.
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6

Plasmid Content Analysis by PFGE

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The plasmid content from wild-type effluent strains, transformants, and transconjugants was analyzed by pulse field gel electrophoresis (PFGE) after S1 nuclease digestion (Barton et al., 1995) (link). All PFGE reagents used were from Bio-Rad (CHEF Genomic DNA Plug Kits). Genomic DNA agarose blocks were digested with S1endonuclease (New England Biolab) for 90 min at 37°C, and then loaded into 1% electrophoretic agarose gel and run with the CHEF-DR II system (Bio-Rad), with a specific program 1-10s,18h, 6V/cm (voltage, pulse time, and electrophoretic time) at 14°C. The gels were then stained with Gel Star® (Lonza, Rockland, ME USA) and analyzed by FPQuest® software (BioRad, Marne la Coquette, France).
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