Celldex Therapeutics has entered into a definitive agreement to acquire Kolltan Pharmaceuticals, a clinical-stage company focused on the discovery and development of antibody-based drugs targeting receptor tyrosine kinases (RTKs), primarily in oncology. Clinical data has shown that Kolltan’s drug candidates can help overcome tumor resistance mechanisms associated with current tyrosine kinase inhibitors. Celldex believes Kolltan’s drug candidates and preclinical platform are compatible with t...