Paramagnetic beads that can be used for flow cytometry?

[Marcella Sarzotti-Kelsoe]

Miltenyi Biotec Inc. developed a wonderful separation system called MACS.
Their system uses super-paramagnetic microbeads that are only 50nm in 
diameter. It allows you to do positive and negative selection of cell 
populations. Finally, the microbeads are sub-microscopic and they do not 
affect the light scattering of labeled cells.  Their address is: 251 
Auburn Ravine Rd., Auburn, CA 95603. Ph. 800-367-6227; FAX (916)-888-8925.
Good luck!
Marcella Sarzotti-Kelsoe