Calcium Binding Dye
Calcium Binding Dye - Related Videos
08:14
Assessing T-cell Receptor-Induced Calcium Influx Using a Calcium Indicator Dye
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2025
This video analyzes T-cell receptor-induced calcium influx in T-cells. Anti-CD3 antibodies activate the T-cell signaling pathways, leading to an increase in intracellular calcium ions that bind with Indo-1 dye. In flow cytometry, a spectrum shift from the calcium-free state to the calcium-bound state correlates with T-cell receptor-induced calcium influx.
17:05
Loading a Calcium Dye into Frog Nerve Endings Through the Nerve Stump: Calcium Transient Registration in the Frog Neuromuscular Junction
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Cited by 13 •
2017
Here, we describe a method for loading a calcium-sensitive dye through the frog nerve stump into the nerve endings. We also present a protocol for the recording and analysis of fast calcium transients in the peripheral nerve endings.
03:22
Calcium-Dependent Hydrophobic Interaction Chromatography: A Technique to Purify Calcium-Binding Proteins Based on Hydrophobic Interactions
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2025
In this video, we demonstrate the purification of calcium-binding protein from a dialyzed cell lysate through calcium-dependent hydrophobic interaction chromatography. The calcium-binding proteins expose a hydrophobic region upon binding with calcium, facilitating interaction with a hydrophobic group on resin. Later these proteins are eluted using calcium chelator EDTA that reverses the interaction.
09:32
Direct Imaging of ER Calcium with Targeted-Esterase Induced Dye Loading (TED)
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Cited by 60 •
2013
Targeted-esterase induced dye loading (TED) supports the analysis of intracellular calcium store dynamics by fluorescence imaging. The method bases on targeting of a recombinant Carboxylesterase to the endoplasmic reticulum (ER), where it improves the local unmasking of synthetic low-affinity Ca2+ indicator dyes in the ER lumen.
08:43
Calcium Imaging in Neurons
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2023
Calcium ions play an integral role in neuron function: They act as intracellular signals that can elicit responses such as altered gene expression and neurotransmitter release from synaptic vesicles. Within the cell, calcium concentration is highly dynamic due to the presence of pumps that selectively transport these ions in response to a variety of signals. Calcium imaging takes advantage of intracellular calcium flux to directly visualize calcium signaling in living neurons.This video begins...
FAQs
Binding converts a biochemical event into an optical readout: when the indicator molecule selectively binds Ca2+, its fluorescence or color changes. The measured signal therefore reflects changes in free intracellular calcium concentration rather than simply the presence of dye. This relationship lets investigators follow calcium dynamics over time in living cells.
Free calcium concentration is the relevant variable because it changes during cellular signaling and can be detected through the dye’s optical response. In neural cells, a transient rise can occur after an action potential or synaptic signaling. Tracking these changes provides a time-linked readout of activity rather than a static measurement of cellular calcium.
Signal quality depends on more than calcium binding alone. Dye loading, indicator concentration, and imaging conditions influence how accurately fluorescence or color changes represent cellular calcium dynamics. These variables must be controlled because inappropriate dye handling may compromise cell health, while unsuitable imaging conditions can reduce measurement accuracy.
An experiment begins by loading living cells with the calcium binding dye, then selecting an appropriate dye concentration and imaging conditions. Fluorescence microscopy is used to monitor the resulting optical changes over time. Maintaining these parameters supports cell health and improves the reliability of measurements obtained from neuronal or other living-cell preparations.
Calcium imaging can reveal transient intracellular signals associated with neuronal activity. By recording optical changes during cellular or synaptic events, researchers can examine when calcium dynamics occur and relate them to neural communication. The resulting measurements help characterize activity patterns in cells and provide experimental evidence about signaling-related responses.
In neuroscience, these indicators support studies at several levels, from neuronal communication to circuit function and cellular responses. Their value comes from connecting optical measurements of calcium dynamics with events that alter intracellular calcium, including action potentials and synaptic signaling. This makes calcium imaging useful for investigating how neural activity is expressed within cells and circuits.