Exo-spin™ technology combines precipitation and size exclusion chromatography (SEC), making it superior to other techniques that rely solely on one method. Using only precipitation for exosome isolation will result in co-purification of large amounts of non-exosomal proteins and other material as well as carryover of the precipitant. SEC is reliable for exosome isolation, but a precipitation step is needed to concentrate your sample prior to SEC isolation. If there is no precipitation, a lower exosome recovery will be observed. We provide a simple two-step protocol which allows you to purify your sample in less than 2 hours with consistent and reliable results!
However, the EX03 Exo-spin™ kit only contains pre-packed and equilibrated ready-to-use SEC columns as the precipitation step might not be recommended for some applications (e.g. mass spectrometry) or not needed for small volumes of sera sample.
The EX03 Exo-spin™ kit has been developed to process any sample smaller than 100 µl. Plasma contains much higher protein levels than sera and can only be processed directly using the EX02 or EX04 Exo-spin™ kit. EX03 Exo-spin™ kit may be used to clean-up samples which have been purified by other methods, such as precipitation and ultracentrifugation, in order to remove proteins and smaller molecules. Exo-spin™ columns are also very effective for the removal of excess dye in fluorescently labelled exosome samples.
* For cerebrospinal fluid (CSF) and human breast milk samples, validated protocols are available for EX01 only. The protocols are provided in the user guides.
† Highly concentrated exosome samples (e.g. 1x1012 particles/ml) other than blood can also be used.
The column bed volume is 500 µl, allowing for 100 µl of volume to be loaded on top of the column.
The pore size of the resin is approximatively 30 nm to attain a highly pure exosome elution. All other molecules (e.g. proteins, lipids) which are smaller than 30 nm will enter into the pores and remain trapped in the column.
As mentioned above, essentially all proteins and lipids will be retained in the column and will elute later than the exosomes, ensuring a highly pure sample ready for your downstream application.
All our columns are manufactured in our laboratory to ensure a high reproducibility between each lot. As proof of reproducibility and batch-to-batch consistency, a large number of peer-reviewed scientific papers have been published describing the use of Exo-spin™.
Upon receipt, store purification columns at 4°C.
For any additional questions, please refer to FAQs document below.
We designed the ideal starter pack to guide your exosome research. The starter pack includes the exosome purification kit of your choice, exosome validated antibodies, and NTA profiling analysis. The complete details can be found in the product page here.