Slot Blot Technique
Slot Blot Technique - Related Videos
13:12
Quantitative Analyses of all Influenza Type A Viral Hemagglutinins and Neuraminidases using Universal Antibodies in Simple Slot Blot Assays
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Cited by 19 •
2011
A simple slot blot method was developed for the quantification of influenza viral hemagglutinin and neuraminidase using universal antibodies targeting their most conserved sequences identified through bioinformatics analyses. This innovative approach may provide a useful alternative to quantitative determination of all viral hemagglutinin and neuraminidase.
09:14
Examination of Proteins Bound to Nascent DNA in Mammalian Cells Using BrdU-ChIP-Slot-Western Technique
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Cited by 4 •
2016
In this protocol, we describe a novel BrdU-ChIP-Slot-Western technique to examine proteins and histone modifications associated with newly synthesized or nascent DNA.
08:48
The Western Blot
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2023
Western Blotting is used to identify the presence of specific proteins in electrophoretically separated samples. Following separation by a technique known as sodium dodecyl sulfate polyacrylamide gel electrophoresis, or SDS-PAGE, western transfer is used to move proteins from a polyacrylamide gel onto a piece of membrane which traps the proteins in their respective locations. Next, the membranes are probed with antibodies in a process called immunboblotting. Immunoblotting uses...
11:43
The Fastest Western in Town: A Contemporary Twist on the Classic Western Blot Analysis
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Cited by 30 •
2014
This protocol explores the latest advancements in performing Western blot analyses. These novel modifications employ a Bis-Tris gel system with a 35 min electrophoresis run time, a 7 min dry blotting transfer system, and infrared fluorescent protein detection and imaging that generates higher resolution, quality, sensitivity, and improved accuracy of Western data.
01:15
Western Blotting
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2023
Western blotting is an analytical technique for protein identification. It has various applications in immunology and medicine, including detecting diseases like bovine spongiform encephalopathy, mad cow disease, and human and feline immunodeficiency virus from biological samples. The technique begins with separating proteins from the sample using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), followed by protein transfer, immunoblotting, and finally, protein detection.
FAQs
Immobilization keeps nucleic acids or proteins fixed in defined sample positions on the membrane, allowing each sample to be examined through the same detection chemistry. Because the molecules remain concentrated in separate slots rather than distributed across a size-separated gel, researchers can compare target presence and relative abundance directly across many samples.
Labeled nucleic acid probes recognize complementary sequences, whereas labeled antibodies recognize protein epitopes, which are the molecular regions they bind. After binding occurs, washing removes signal from nonspecific interactions. The remaining label therefore indicates the target recognized by the selected probe or antibody, supporting detection of particular nucleic acids or proteins.
The technique provides target-focused comparison but does not resolve molecules according to size. A positive signal can show that a selected nucleic acid or protein is present and support semi-quantitative comparison, yet it cannot distinguish differently sized molecules within the detected material. This makes it less suitable when molecular size information is essential.
Samples are drawn through narrow slots so their target molecules become fixed in corresponding membrane locations. A labeled probe or antibody is then allowed to bind, followed by washing to reduce nonspecific signal and detection of the retained label. Researchers interpret the resulting signals to screen for target presence or compare abundance among samples.
In biology, slot blots can examine gene expression, DNA abundance, RNA abundance, and protein levels. The appropriate detection reagent depends on the target: nucleic acid probes support sequence-based measurements, while antibodies support protein detection. These applications make the method useful when many samples require rapid, direct comparison rather than molecular size analysis.
A slot blot is most useful when throughput and direct comparison across samples matter more than separating molecules by size. It supports rapid screening and confirmation of whether a selected target is present, while also enabling semi-quantitative comparisons. Researchers would favor this approach for broad sample assessment when size resolution is not the primary question.