Effects of S1 cleavage on the structure, surface export, and signaling activity of human Notch1 and Notch2. oleh Wendy R Gordon, Didem Vardar-Ulu, Sarah L'Heureux, Todd Ashworth, Michael J Malecki, Cheryll Sanchez-Irizarry, Debbie G McArthur, Gavin Histen, Jennifer L Mitchell, Jon C Aster, Stephen C Blacklow