Gus Activity Measurement
Gus Activity Measurement - Related Videos
07:35
A β-glucuronidase (GUS) Based Cell Death Assay
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Cited by 5 •
2011
Programmed cell death assays commonly used in mammalian systems such as DNA laddering or TUNEL assays, are often difficult to reproduce in plants. In combination with a GUS reporter system, we propose a rapid, plant based transient assay to analyze the potential death properties of specific genes.
09:30
Measurement of Larval Activity in the Drosophila Activity Monitor
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Cited by 10 •
2015
This report describes a method for measuring Drosophila larval activity using the TriKinetics Drosophila Activity Monitor. The device employs infrared beams to detect movements of up to 16 individual animals. Data can be analyzed to represent motion parameters including rates and the positions of the animals within the assay chambers.
08:31
Agrobacterium tumefaciens and Agrobacterium rhizogenes-Mediated Transformation of Potato and the Promoter Activity of a Suberin Gene by GUS Staining
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Cited by 7 •
2019
Here, we present two protocols to transform potato plants. The Agrobacterium tumefaciens transformation leads to a complete transgenic plant while the Agrobacterium rhizogenes produces transgenic hairy roots in a wild type shoot that can be self-propagated. We then detect promoter activity by GUS staining in the transformed roots.
05:20
Drosophila Activity Monitor (DAM): A Method to Measure Locomotor Activity in Flies
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2023
This video describes the Drosophila activity monitor (DAM) system used to track locomotor activity. Researchers use activity data collected from the DAM to study circadian rhythms in fruit flies. The featured protocol clip shows how to load flies in the device and record activity data for circadian experiments.
09:33
In Vitro Assay to Measure Phosphatidylethanolamine Methyltransferase Activity
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Cited by 2 •
2016
The present report describes an in vitro enzymatic assay to measure phosphatidylethanolamine methyltransferase activity using Leishmania cell extracts. This assay is based on the transfer of a radioactive methyl group from S-[Methyl-3H]adenosyl-L-methionine onto endogenous phosphatidylethanolamine.
FAQs
The substrate determines how β-glucuronidase activity becomes detectable. 4-methylumbelliferyl-β-D-glucuronide produces a fluorescent product suited to quantitative measurement, whereas X-Gluc produces a colored product that can be examined in tissues. Choosing between them therefore depends on whether the experiment prioritizes numerical comparison of samples or visualization of expression location.
Fluorescent readouts support quantitative assays in which signal intensity can be compared across samples. Colored products generated from X-Gluc are useful for histochemical staining because the signal can be observed within cells or tissues. This distinction allows investigators to select an output that emphasizes expression level or spatial distribution.
Changes in β-glucuronidase signal can indicate when and where a promoter is active. Comparing patterns among tissues or developmental stages helps reveal tissue-specific expression and developmental regulation. In plant biology, these measurements connect promoter behavior with visible spatial or temporal expression patterns rather than treating gene activity as uniform across the organism.
A typical workflow applies a glucuronide-linked substrate to biological samples containing the reporter enzyme, allows product formation, and then evaluates the resulting fluorescent or colored signal. Quantitative assays compare signal among samples, while histochemical staining examines its distribution in cells or tissues. The selected readout should match the experimental question.
Quantitative assays are appropriate when researchers need to compare reporter activity between samples, such as different biological conditions or experimental groups. Histochemical staining is preferable when the central question concerns where expression occurs within a tissue. Using both approaches can provide complementary information about the amount and location of promoter activity.
In plant research, the method can help examine gene regulation, tissue-specific expression, and developmental patterns. It also supports evaluation of transformation efficiency by revealing reporter activity in experimental material. These applications make the assay useful for connecting promoter behavior with plant tissues, developmental stages, and outcomes of transformation experiments.