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CELLESTIAL® Assays
Untreated cells have calcium response
Inconsistent DMSO concentration. Ensure that buffer used for the negative control wells has the same final concentration of DMSO as…
Tue, Jul 18, 2023
Well-to-well variation observed
Incorrect dispensing and/or experimental setup parameter used. A fluorescence microplate reader with automatic dispensing should be used for assays requiring precise…
Tue, Jul 18, 2023
More than two populations appear upon apoptosis induction.
It's the property of the dye. Apoptosis is a multi-stage process and Nuclear-ID green dye can distinguish different levels of…
Tue, Jul 18, 2023
Mito-ID cell staining is too strong
Mitochondrial membrane potential dye is too concentrated for the cell type used. Optimize for different cell types by diluting the…
Tue, Jul 18, 2023
In the sPLA2 activity kit (ADI-907-002), how is a Unit defined?
One unit of phospholipase activity is the amount of enzyme needed to hydrolyze 1.0 µmole of L-a-phosphatidylcholine to L-a-lysophosphatidylcholine and…
Tue, Jul 18, 2023
DNA histograms are of poor overall quality.
The key elements in obtaining a histogram of high quality are good sample preparation, correct cell-to dye ratio and proper…
Tue, Jul 18, 2023
No decrease of the fluorescent signal after using a specific inhibitor
Inhibitor concentration is too low or too high. Very low doses of inhibitor may not affect ROS production by inducer.…
Tue, Jul 18, 2023
Low or no fluorescent signal in positive control
Species of interest may react with each other, thus attenuating the expected signal. ROS is a complex interacting system. Blocking…
Tue, Jul 18, 2023
High fluorescence signal observed in negative control
Sample contains interfering substances. The assay is compatible with commonly used buffers (PBS, Tris, HEPES) and excipients (trehalose and sucrose),…
Tue, Jul 18, 2023
More than one aggregation peak is observed.
A protein might have multiple domains that start aggregation at different temperatures. For most samples, any aggregation is an indication…
Tue, Jul 18, 2023