Dna Probe Binding
Dna Probe Binding - Related Videos
14:57
DNA Stable-Isotope Probing (DNA-SIP)
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DNA stable-isotope probing is a cultivation-independent method to identify and characterize active communities of microorganisms that are capable of utilizing specific substrates. Assimilation of substrate enriched in heavy isotope leads to incorporation of labelled atoms into microbial biomass. Density gradient ultracentrifugation retrieves labelled DNA for downstream molecular analyses.
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Robust 3D DNA FISH Using Directly Labeled Probes
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We describe a robust and versatile protocol for analyzing nuclear architecture by 3D DNA FISH using directly labeled fluorescent probes.
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Labeling DNA Probes
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2021
DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions. Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
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Methyl-binding DNA capture Sequencing for Patient Tissues
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Here we present a protocol to investigate genome wide DNA methylation in large scale clinical patient screening studies using the Methyl-Binding DNA Capture sequencing (MBDCap-seq or MBD-seq) technology and the subsequent bioinformatics analysis pipeline.
08:51
Visualization of Surface-tethered Large DNA Molecules with a Fluorescent Protein DNA Binding Peptide
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Cited by 7 •
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We present an approach for visualizing fluorescent protein DNA binding peptide (FP-DBP)-stained large DNA molecules tethered on the polyethylene glycol (PEG) and avidin-coated glass surface and stretched with microfluidic shear flows.
FAQs
Temperature and salt concentration tune hybridization selectivity. Changing temperature affects whether complementary strands remain associated, while salt concentration influences the stability of that association. Conditions that favor stronger sequence matching help retain appropriately paired probes and reduce binding to less-matched targets. This control is essential when experiments must distinguish closely related genetic sequences.
Sequence matching determines both binding strength and selectivity because complementary bases pair through hydrogen bonds. A probe with stronger complementarity to the target is more likely to form the intended association than one with poorer matching. This principle lets investigators discriminate among related sequences, including genetic variants that differ in their nucleotide sequence.
Labeling makes the bound probe detectable after it associates with its target. The signal can reveal where a sequence occurs or whether a particular genetic target is present, depending on the assay format. This feature connects the molecular pairing event to observable results in microscopy, blot-based analysis, microarrays, and nucleic acid assays.
Researchers expose the labeled probe and nucleic acid target to conditions selected for sequence discrimination, with temperature and salt concentration as key variables. They adjust these factors according to the required balance between stable association and selectivity. Careful control helps the resulting signal reflect the intended target rather than less closely matched sequences.
In fluorescence in situ hybridization, binding helps locate sequences within biological material. Southern blotting and microarrays apply the same sequence-recognition principle to genetic analysis, while nucleic acid assays use it to detect specific targets. These formats extend one molecular mechanism to microscopy, genome analysis, and other approaches for examining genetic information.
It can help determine whether a gene, mutation, or pathogen-associated target is present, and it can reveal gene expression patterns when used in an appropriate nucleic acid assay. Researchers also apply the approach to genome analysis and microscopy. The resulting information supports diagnostics and molecular research by connecting sequence-specific signals with biological targets.