1.Davidson S, Jonas O, Keibler M, Hou H, Luengo A, Mayers J, Wyckoff J, Del Rosario A, Whitman M, Chin C, Condon K, Lammers A, Kellersberger K, Stall B, Stephanopoulos G, Bar-Sagi D, Han J, Rabinowitz J, Cima M, Langer R, Heiden M. Direct evidence for cancer-cell-autonomous extracellular protein catabolism in pancreatic tumors. Nat Med. 2017;23(2):235–241. PMCID: PMC5407288 Reference Link