Rrna Fish Probes
Rrna Fish Probes - Related Videos
12:16
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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11:15
In Situ Detection of Bacteria within Paraffin-embedded Tissues Using a Digoxin-labeled DNA Probe Targeting 16S rRNA
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07:25
Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria
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02:32
Osmoregulation in Fishes
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2019
When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments? Fish employ osmoregulatory strategies to balance bodily levels of water and dissolved ions (i.e., solutes), such as sodium and chloride. Imagine two solutions separated by a membrane that is permeable to water.
FAQs
Detection depends on the probe recognizing a complementary sequence within ribosomal RNA. A probe therefore provides identification at the species or group level according to the rRNA sequence it targets. This sequence-based selectivity allows researchers to distinguish particular members of a microbial community while examining their locations within the same preserved sample.
Fixation preserves the sample and its spatial organization, while permeabilization helps the fluorescently labeled oligonucleotides reach accessible rRNA inside cells or microorganisms. These preparation steps connect molecular recognition with spatial observation. If rRNA remains inaccessible, probe binding and the resulting fluorescence may not adequately represent the cells present in the sample.
Hybridization occurs under controlled temperature and salt conditions that support binding between the probe and its complementary rRNA sequence. These conditions are important because probe attachment depends on the interaction between the two nucleic acid sequences. Controlling them helps produce interpretable fluorescence patterns for identifying targeted cells or microbial groups.
Fluorescence reveals where probe-bound cells or microorganisms are located within the preserved sample. The resulting microscopy image can therefore connect identity with distribution rather than reporting only that a target is present. This spatial information is especially useful for examining organization in microbial communities, bioengineered tissues, and bioreactor systems.
A typical workflow begins by fixing the sample and permeabilizing its cells or microorganisms. Fluorescently labeled probes are then introduced under controlled temperature and salt conditions so they can hybridize with accessible rRNA. Finally, microscopy detects the fluorescence from bound probes, allowing researchers to identify targets and evaluate their spatial distribution.
In bioengineering, these probes can profile microbial communities and visualize cell distribution in bioengineered tissues, bioreactors, and other complex systems. Their value comes from retaining spatial context while identifying selected cells or microorganisms. Researchers can therefore examine not only community composition, but also where particular microbial groups occur within an engineered environment.