Jeff developed the method for purifing NF-AT and later cloned NF-ATc1 and c2 with Steffan Ho. He and Luika Timmerman also showed that NF-ATc family members shuttled into and out of the nucleus and that this shuttling allowed the discrimination of the Ca2+ signals originating from CRAC channels from those originating at IP3 gated intracellular channels. Jeff went to Affimax at exactly the right time and can be reached at: Jeff_Northrop@qmgates.affymax.com