Developing therapeutics to transform patient outcomes with protein engineering and disruptive technology.

At xCella Biosciences, we are changing the game of protein drug discovery. Our disruptive single-cell xPloration screening technology and proprietary xEmplar human antibody library, combined with our team’s deep expertise in protein engineering and disease biology, are enabling rapid discovery and development of next-generation therapies for patients. 


We are building a pipeline of best-in-class therapeutics against challenging targets in oncology and other disease areas. Our lead molecule XC-201 is a unique clinic-ready asset that harnesses the innate and adaptive immune systems to attack a broad range of tumors.


Our Technologies

Innovative technologies paired with world-class talent accelerate discovery of best-in-class protein therapeutics.

Phone:      (650) 461 - 4503


1440 O’Brien Drive, Suite D

Menlo Park, CA 94025