I want to isolate the exosome from the serum free cell culture medium by ultracentrifugation. At least how much media will be sufficient for this and can you provide a successful protocol?
I work at Immunostep, a biotech company that developed a full product line dedicated to exosomes due to their potential. Maybe I can help you from my experience.
I would recommend you to check our website, specifically the ExoStep one: https://immunostep.com/exosomes/exostep-platform-detection-and-characterization/
Furthermore, you will find attached in this message the Technical Data Sheet of the ExoStep Cell Culture, that has a part dedicated to the Protocol of Use.
I think that it will help you and clarify a lot of questions.
Here is some protocols and overview of different ultracentrifugation methods: http://assets.thermofisher.com/TFS-Assets/LPD/Application-Notes/protocol-cell-culture-exosome-whitepaper.pdf