Pcr Verification
Pcr Verification - Related Videos
03:00
Self-Evaluation: Self-Enhancement and Self-Verification
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2020
Social psychologists have documented that feeling good about ourselves and maintaining positive self-esteem is a powerful motivator of human behavior (Tavris & Aronson, 2008). In the United States, members of the predominant culture typically think very highly of themselves and view themselves as good people who are above average on many desirable traits (Ehrlinger, Gilovich, & Ross, 2005). Often, our behavior, attitudes, and beliefs are affected when we experience a threat to our...
01:17
Strategies of Self-Presentation II: Self-Verification
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2025
Self-verification is a fundamental psychological drive wherein individuals seek affirmation of their self-concept from others, striving for consistency between their internal self-view and external perceptions. This drive operates even when the self-concept is negative, influencing interpersonal behavior and feedback preferences in complex and often counterintuitive ways. Unlike the self-enhancement motive, which seeks positive evaluations, self-verification prioritizes coherence and...
08:51
Genotyping of Staphylococcus aureus by Ribosomal Spacer PCR (RS-PCR)
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Cited by 9 •
2016
Here, ribosomal spacer PCR (RS-PCR) is used together with a miniaturized electrophoresis system as a fast and high resolution method for genotyping S. aureus at moderate costs allowing a high throughput.
07:00
Failure of Cleaning Verification in Pharmaceutical Industry Due to Uncleanliness of Stainless Steel Surface
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Cited by 2 •
2017
The lack of a well-defined procedure that consistently cleaned coupon surfaces was identified as the major contributor to low and variable recoveries in cleaning verification. This manuscript describes the correct protocol of cleaning stainless steel coupons.
02:41
Clonal Isolation and PCR Screening of GFP-Excised Recombinant Herpesvirus Retaining the Target Gene
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2026
Source: Tang, N., et al. Generating Recombinant Avian Herpesvirus Vectors with CRISPR/Cas9 Gene Editing. J. Vis. Exp. (2019)This video demonstrates the clonal isolation and PCR-based screening of recombinant herpesvirus following site-specific excision of a GFP marker. Fluorescence-activated cell sorting is used to isolate non-fluorescent infected cells, and junction PCR confirms retention of the target gene in GFP-negative clones.
FAQs
Primer sequences direct DNA polymerase toward a particular DNA region during the annealing step. Their sequence specificity helps determine whether the reaction copies the intended target rather than unrelated DNA. Across repeated cycles of denaturation, annealing, and extension, this targeting produces an amplicon that can later be evaluated for the expected result.
The expected amplicon size provides a reference for interpreting the band produced after agarose gel electrophoresis. A band at that expected size supports amplification of the intended target, whereas a different result indicates that the reaction does not match the anticipated outcome. This size check is therefore central to evaluating PCR accuracy.
Controls help distinguish successful target amplification from contamination or nonspecific amplification. In particular, researchers examine whether control reactions remain free of unexpected bands. If a control shows amplification when it should not, the result may reflect contamination rather than the intended DNA target, weakening confidence in the experimental PCR result.
Agarose gel electrophoresis provides a visual way to examine the PCR product. Researchers assess whether a band is present and compare its position with the expected amplicon size. They also consider the control results on the gel, allowing the product pattern to be interpreted in relation to specificity and possible contamination.
PCR verification is useful whenever a study requires evidence that a particular DNA sequence was amplified. Applications described for the method include genetic analysis, cloning, pathogen detection, and mutation screening. In each setting, checking the amplification product helps researchers determine whether the PCR result is suitable for the intended biological investigation.
The workflow begins with PCR amplification through repeated denaturation, primer annealing, and extension. Researchers then evaluate the resulting amplicon using agarose gel electrophoresis, looking for a band at the expected size. Finally, they interpret that band together with the controls, checking for evidence of nonspecific amplification or contamination before using the result.