Feng worked with Isabella Graef to show that signaling through Calcineurin and NFATc3 and c4 were essential for the patterning of the vascular system (Cell 2001). He found that NFAT signaling locally represses VEGF and other secreted molecules to organize the pattern of blood vessels in the vertebrate embryo. He is an Assistant Professor at Washington University at St Louis. He can be reached at: fchen@im.wustl.edu.