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NucleoCassettes

The NucleoCassette is a highly specialised device, which holds the key to several of the unique features of the NucleoCounter YC-100. The fluorescent dye propidium iodide (PI) is immobilized in the interior flow channels of the disposable cassette. When the cassette has been loaded with approximately 50 µl of sample mixture the PI is dissolved and mixed with the sample, staining the nuclei of the yeast cells.


After placement in the NucleoCounter YC-100 the stained mixture is automatically transferred to the measurement chamber, where the fluorescent image is recorded. The measurement volume is as large as 1 µl.
 
After analysis the sample and the PI is contained inside the cassette, which can be safely discarded. This offers a safe sample handling and disposal.
As the NucleoCassette contains the entire flow system as well as the measurement chamber, neither cleaning nor maintenance of the NucleoCounter instrument itself is needed.

 


PI


The fluorescent dye propidium iodide (PI) stains the DNA of cell nuclei. The PI intercalates with the DNA with 1 dye molecule per 4-5 DNA base pairs.

As little as about 2.8 μg of PI is immobilized in each NucleoCassette.
As PI stains the cell nuclei it needs to be permeable to the dye. The dye cannot penetrate a viable cell and thus it is necessary to lyse the cell membrane prior to staining, when counting the total amount of cells.

Non-viable cells, on the other hand, are permeable and can therefore be stained directly with the PI and counted by the NucleoCounter YC-100. Combining these two results makes it possible to determine the cell viability of a sample

PI intercalation with dsDNA

NucleoCounter Concept
NucleoCounter YC-100 Concept
Benefits YC
YC-100 Instrument
NucleoCassette
Reagent Y100
Cell Viability
NucleoView Software
Operation 1 - 2 - 3
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