EasySep™ Mouse CD19 Positive Selection Kit II

Immunomagnetic positive selection kit

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From: 688 USD


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Immunomagnetic positive selection kit
From: 688 USD

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The EasySep™ Mouse CD19 Positive Selection Kit II is designed to isolate CD19+ cells from single-cell suspensions of splenocytes or other tissues by positive selection. Desired cells are targeted with antibody complexes recognizing CD19 and dextran-coated magnetic particles. Labeled cells are separated using an EasySep™ magnet without the use of columns. Cells of interest remain in the tube while unwanted cells are poured off.

This product replaces the EasySep™ Mouse CD19 Positive Selection Kit (Catalog #18754) for even faster cell isolations and does not result in the labeling of isolated cells with PE.
• Fast and easy-to-use
• Up to 99% purity
• No columns required
• Isolated cells are not fluorochrome-labeled
  • EasySep™ Mouse CD19 Positive Selection Kit II (Catalog #18954)
    • EasySep™ Mouse CD19 Positive Selection II Component A, 0.5 mL
    • EasySep™ Mouse CD19 Positive Selection II Component B, 0.5 mL
    • EasySep™ Dextran RapidSpheres™ 50100, 2 x 1 mL
    • RoboSep™ Empty Vial
  • RoboSep™ Mouse CD19 Positive Selection Kit II (Catalog #18954RF)
    • EasySep™ Mouse CD19 Positive Selection II Component A, 0.5 mL
    • EasySep™ Mouse CD19 Positive Selection II Component B, 0.5 mL
    • EasySep™ Dextran RapidSpheres™ 50100, 2 x 1 mL
    • RoboSep™ Empty Vial
    • RoboSep™ Buffer (Catalog #20104)
    • RoboSep™ Filter Tips (Catalog #20125) x 2
Magnet Compatibility:
• EasySep™ Magnet (Catalog #18000)
• “The Big Easy” EasySep™ Magnet (Catalog #18001)
• EasyEights™ EasySep™ Magnet (Catalog #18103)
• RoboSep™-S (Catalog #21000)
Cell Isolation Kits
Cell Type:
B Cells
Sample Source:
Other; Spleen
Selection Method:
Cell Isolation
EasySep; RoboSep
Area of Interest:

Scientific Resources

Educational Materials


Frequently Asked Questions

Can EasySep™ be used for either positive or negative selection?

Yes. The EasySep™ kits use either a negative selection approach by targeting and removing unwanted cells or a positive selection approach targeting desired cells. Depletion kits are also available for the removal of cells with a specific undesired marker (e.g. GlyA).

How does the separation work?

Magnetic particles are crosslinked to cells using Tetrameric Antibody Complexes (TAC). When placed in the EasySep™ Magnet, labeled cells migrate to the wall of the tube. The unlabeled cells are then poured off into a separate fraction.

Which columns do I use?

The EasySep™ procedure is column-free. That's right - no columns!

How can I analyze the purity of my enriched sample?

The Product Information Sheet provided with each EasySep™ kit contains detailed staining information.

Can EasySep™ separations be automated?

Yes. RoboSep™, the fully automated cell separator, automates all EasySep™ labeling and cell separation steps.

Can EasySep™ be used to isolate rare cells?

Yes. We recommend a cell concentration of 2x108 cells/mL and a minimum working volume of 100 µL. Samples containing 2x107 cells or fewer should be suspended in 100 µL of buffer.

Are the EasySep™ magnetic particles FACS-compatible?

Yes, the EasySep™ particles are flow cytometry-compatible, as they are very uniform in size and about 5000X smaller than other commercially available magnetic beads used with column-free systems.

Can the EasySep™ magnetic particles be removed after enrichment?

No, but due to the small size of these particles, they will not interfere with downstream applications.

Can I alter the separation time in the magnet?

Yes; however, this may impact the kit's performance. The provided EasySep™ protocols have already been optimized to balance purity, recovery and time spent on the isolation.

For positive selection, can I perform more than 3 separations to increase purity?

Yes, the purity of targeted cells will increase with additional rounds of separations; however, cell recovery will decrease.

How does the binding of the EasySep™ magnetic particle affect the cells? is the function of positively selected cells altered by the bound particles?

Hundreds of publications have used cells selected with EasySep™ positive selection kits for functional studies. Our in-house experiments also confirm that selected cells are not functionally altered by the EasySep™ magnetic particles.

If particle binding is a key concern, we offer two options for negative selection. The EasySep™ negative selection kits can isolate untouched cells with comparable purities, while RosetteSep™ can isolate untouched cells directly from whole blood without using particles or magnets.
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Product Applications

This product is designed for use in the following research area(s) as part of the highlighted workflow stage(s). Explore these workflows to learn more about the other products we offer to support each research area.

Data and Publications


Typical EasySep™ CD19 Positive Selection Profile

Figure 1. Typical EasySep™ CD19 Positive Selection Profile

Starting with mouse splenocytes, the CD19+ cell content of the isolated fraction is typically 98.1 ± 0.6% (mean ± SD using the purple EasySep™ Magnet).


Cell reports 2019 dec

Discovery of Small Molecules for the Reversal of T Cell Exhaustion.

B. S. Marro et al.


Inhibitory receptors (IRs) function as critical regulators of immune responses by tempering T cell activity. In humans, several persisting viruses as well as cancers exploit IR signaling by upregulating IR ligands, resulting in suppression of T cell function (i.e., exhaustion). This allows escape from immune surveillance and continuation of disease. Here, we report the design, implementation, and results of a phenotypic high-throughput screen for molecules that modulate CD8+ T cell activity. We identify 19 compounds from the ReFRAME drug-repurposing collection that restore cytokine production and enhance the proliferation of exhausted T cells. Analysis of our top hit, ingenol mebutate, a protein kinase C (PKC) inducing diterpene ester, reveals a role for this molecule in overriding the suppressive signaling cascade mediated by IR signaling on T cells. Collectively, these results demonstrate a disease-relevant methodology for identifying modulators of T cell function and reveal new targets for immunotherapy.
Genes and immunity 2016 SEP

Natural genetic variation profoundly regulates gene expression in immune cells and dictates susceptibility to CNS autoimmunity.

Bearoff F et al.


Regulation of gene expression in immune cells is known to be under genetic control, and likely contributes to susceptibility to autoimmune diseases such as multiple sclerosis (MS). How this occurs in concert across multiple immune cell types is poorly understood. Using a mouse model that harnesses the genetic diversity of wild-derived mice, more accurately reflecting genetically diverse human populations, we provide an extensive characterization of the genetic regulation of gene expression in five different naive immune cell types relevant to MS. The immune cell transcriptome is shown to be under profound genetic control, exhibiting diverse patterns: global, cell-specific and sex-specific. Bioinformatic analysis of the genetically controlled transcript networks reveals reduced cell type specificity and inflammatory activity in wild-derived PWD/PhJ mice, compared with the conventional laboratory strain C57BL/6J. Additionally, candidate MS-GWAS (genome-wide association study candidate genes for MS susceptibility) genes were significantly enriched among transcripts overrepresented in C57BL/6J cells compared with PWD. These expression level differences correlate with robust differences in susceptibility to experimental autoimmune encephalomyelitis, the principal model of MS, and skewing of the encephalitogenic T-cell responses. Taken together, our results provide functional insights into the genetic regulation of the immune transcriptome, and shed light on how this in turn contributes to susceptibility to autoimmune disease.Genes and Immunity advance online publication, 22 September 2016; doi:10.1038/gene.2016.37.