Probe Method
Probe Method - Related Videos
02:38
Local Heat Probe Assay: A Method to Assess Nociception of High Temperatures in Drosophila Larvae
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2023
Drosophila larvae have dedicated sensory neurons–nociceptors–whose response to potentially harmful thermal stimuli triggers aversive–or so-called "nocifensive"–behaviors in the animal. This video describes a method to assess thermal nociception by recording larval behavior in response to local application of a heat probe onto the cuticle. This method is, therefore, called the local heat probe assay.
02:45
Chloroplast Research Methods: Probing The Targeting, Localization And Interactions Of Chloroplast Proteins
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Cited by 3 •
2019
Chloroplasts are the organelles that define plants1. Along with many other metabolic, developmental and signaling functions, chloroplasts are responsible ...
05:38
Custom-made Microdialysis Probe Design
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Cited by 9 •
2015
Microdialysis is a commonly used technique in neuroscience research. Therefore commercial probes are in great demand.In this work a probe assembly is explained in detail to build a reliable, concentric, custom-made microdialysis probe for less than $10.
07:28
Measurement of Bioelectric Current with a Vibrating Probe
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Cited by 15 •
2011
The manufacture, calibration and use of non-invasive vibrating probes to measure bioelectric current in various biological systems is described.
13:58
Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
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Cited by 1 •
2016
This paper reports the nanomaterial fabrication of a fullerene Si substrate inspected and verified by nanomeasurements and molecular dynamic simulation.
FAQs
Specificity comes from sequence complementarity: the probe recognizes a matching nucleic acid sequence through base pairing rather than binding indiscriminately to all molecules in a sample. This allows researchers to distinguish particular genes, transcripts, or pathogen-associated sequences. The resulting signal can reveal whether the target is present and support comparisons among biological samples.
The label determines how recognition becomes measurable. Fluorescent labels support visualization, radioactive labels provide detectable emissions, and enzymatic or chemical labels generate signals through their associated reactions. Because these options produce different signal types, researchers can adapt probe methods for hybridization assays, gene expression measurements, pathogen detection, genotyping, or microscopy.
Recognition does not depend exclusively on nucleic acid base pairing. Some probes bind proteins or cellular structures through selective molecular interactions, allowing investigators to examine targets that do not contain a complementary DNA or RNA sequence. This broader binding capability extends probe-based analysis from sequence detection to the study of cellular organization and biological structure.
A detectable signal provides an indirect measurement of a target that may otherwise be difficult to observe. By comparing signals among samples or locations, researchers can assess relative target abundance or distribution. In gene expression studies, this approach helps investigate differences in transcript levels, while microscopy can show where recognized molecules or structures occur within cells.
A typical workflow selects a probe that recognizes the biological target, associates it with an appropriate detectable label, and brings it into contact with the sample. Researchers then detect the resulting fluorescent, radioactive, enzymatic, or chemical signal and interpret its location or relative amount. The exact format depends on whether the experiment uses hybridization, genotyping, pathogen detection, or microscopy.
This approach is useful when the goal is to locate, identify, or compare a specific biological target. Applications include measuring gene expression, detecting pathogens, distinguishing genotypes, and visualizing molecules or structures by microscopy. In each case, selective recognition connects the target to an observable signal, helping researchers examine biological organization, distribution, and function.