The Amicon Ultra-4 centrifuge filter unit provides high recovery purification and concentration of proteins of interest. With a 10,000 molecular weight cutoff, sample volumes as high as 4 µL can be concentrated in as few as 5 minutes with negligible loss of sample. The device’s Ultracel regenerated cellulose membrane minimizes adsorption of macromolecules and provides high recovery of fully functional proteins.
     Amicon Ultra-4 centrifugal filters are compatible with most rotor types and allow for direct pipette access to eliminate the need for an extra processing step. The device is available in packs of 8, 24, and 96 filter units, which come assembled with centrifuge tubes and caps.

Millipore Corp
(978) 715-4321; www.millipore.com