We have. Please let me know how I could be of any help.

Hello Sharon,

Does the principal behind velocity gradient centrifugation change with type of material floated on such gradients?

dear Jessica,

you can find protocols with Optiprep online (apllication sheet V34) and some publications like this one:

"Discrimination between exosomes and HIV-1: purification of both vesicles from cell-free supernatants" (Cantin R et al (2008) J. Immunol. Methods)

best

I dont think that this could works. I think that both virus and exosomes will be contaminated by each other. Honestly I did not see a good protocol to do this. I saw paper cited by David Fenard, it was good but I still think that you will get troubles with contamination depending of your real interest.