MabVax Therapeutics Holdings, Inc., announces receipt of notice from the U.S. Food and Drug Administration (FDA) authorizing initiation of a Phase I clinical trial with 89Zr-HuMab-5B1 as a new generation PET scan cancer imaging agent in patients with pancreatic cancer. The Company filed an Investigational New Drug (IND) application for this trial with the FDA on December 29, 2015. MabVax previously announced receipt of FDA authorization for a Phase I trial with HuMab-5B1 as a therapeutic treatment for patients with pancreatic cancer, and patient enrollment in both Phase I trials is expected to commence in the first quarter of 2016.