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There are 3 situations when an FMO control is highly recommended! Plus a cute puppy, AND our cell biology virtual event live tomorrow! Details all here...
BosterBio | Antibodies, ELISA Kits, Detection Kits
September 26, 2017
Dr. Booster

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fmo controls

The Fluorescence Minus One (FMO controls) are staining controls that contain all the antibodies of a panel minus 1 of them. It measures the spillover of all those other fluorophores in the channel of the missing antibody, and is used to identify and gate cells in the context of data spread due to the multiple fluorophores. It is a stronger negative control than the regular unstained control as it takes into account how the other stains in the panel impact the channel that is left out.

There are 3 situations when an FMO control is highly recommended! Click the meme for more FACS controls info!

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1. When using a multicolor panel with 6-10 colors of relatively high overlapping spectra

With the addition of every new color, the chances of non-specific spillover increases in practically every channel. FMO controls can remove any discrepancies that remain even after all the colors have been compensated for.

2. When the antigen expression levels are low or unknown

If the signal shift for a marker is minimal – say less than 1 log shift – it is difficult to be certain that the shift is real and not just an artefact. An FMO control can help you set a negative/positive boundary with more confidence compared to the unstained control.

3. When detecting rare cells or cells which require complex gating

Not all FACS analyses can be as simple as separating T and B cells – take for example, completely different populations that appear as distinct blobs following CD3/CD19 staining. Detection of rare or complex cell sub-populations through a multicolor panel requires very precise gating, the limits of which can be accurately set by utilizing the FMO controls.

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Dr. Booster BosterBio | Antibodies, ELISA Kits, Detection Kits

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