Post-hybridization Washes
Post-hybridization Washes - Related Videos
08:00
Whole-Mount In Situ Hybridization
0 Views •
2023
Whole-mount in situ hybridization (WMISH) is a common technique used for visualizing the location of expressed RNAs in embryos. In this process, synthetically produced RNA probes are first complementarily bound, or "hybridized," to the transcripts of target genes. Immunohistochemistry or fluorescence is then used to detect these RNA hybrids, revealing spatial and temporal patterns of gene expression. Unlike traditional in situ hybridization techniques, which require thin tissue sections whose...
00:52
Washing, Drying, and Ignition of Precipitates
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2024
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
06:46
Pulsed Laser Diode-Based Desktop Photoacoustic Tomography for Monitoring Wash-In and Wash-Out of Dye in Rat Cortical Vasculature
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Cited by 9 •
2019
A compact pulsed laser diode-based desktop photoacoustic tomography (PLD-PAT) system is demonstrated for high-speed dynamic in vivo imaging of small animal cortical vasculature.
03:24
Hybridization of Atomic Orbitals I
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2020
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
03:35
Hybridization of Atomic Orbitals II
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2020
sp3d and sp3d 2 Hybridization To describe the five bonding orbitals in a trigonal bipyramidal arrangement, we must use five of the valence shell atomic orbitals (the s orbital, the three p orbitals, and one of the d orbitals), which gives five sp3d hybrid orbitals. With an octahedral arrangement of six hybrid orbitals, we must use six valence shell atomic orbitals (the s orbital, the three p orbitals, and two of the d orbitals in its valence shell), which gives six sp3d 2 hybrid orbitals.
FAQs
Stringency determines how selectively a wash removes probe-target duplexes. More demanding conditions favor retention of stable, complementary hybrids while disrupting mismatched or weakly bound probes. Researchers adjust this selectivity to reduce nonspecific background without erasing the genuine signal, which directly affects the reliability of molecular localization in specimens.
Temperature, salt concentration, and detergent content are the principal adjustable features identified for these washes. Together, they regulate hybridization stringency by changing which probe-target interactions withstand rinsing. Controlling the combination allows a protocol to preserve complementary hybrids while removing less stable associations, rather than treating every bound probe as equally specific.
Poorly controlled conditions can leave weak or mismatched probes attached, increasing background and making genuine expression patterns harder to distinguish. Conditions that are too disruptive could also remove stable signal-bearing hybrids. Careful control therefore protects both signal-to-noise ratio and spatial resolution, two properties needed to interpret where molecular signals occur.
A plan should specify the wash solution’s salt concentration and detergent content, together with the temperature at which rinsing occurs. These parameters are not incidental details: they establish the intended stringency after probe hybridization. Recording them helps maintain consistent treatment across embryos, tissues, or whole-mount specimens and supports comparable signal patterns.
In in situ hybridization, the washes follow probe hybridization in embryos, tissues, or whole-mount specimens. Their role is to refine the visible distribution of labeled nucleic acid probes so that localized signals can be related to developmental gene expression. This makes the method useful for examining patterns associated with tissue patterning and cell differentiation.
A clearer signal does not merely make an image easier to view; it improves the spatial information available for interpretation. When background is reduced and resolution is improved, researchers can more accurately assess where labeled probes remain associated with target sequences. In developmental studies, that localization supports analysis of gene regulation, tissue patterning, and cell differentiation.