ExpreS2ion Biotechnologies is a world leading biotech company within protein production in Drosophila Schneider-2 (S2) cells. The company is a spin-off of Affitech and is based on the proprietary Drosophila S2 technology that was developed over ten years at Pharmexa by the founders of ExpreS2ion Bio and their team. ExpreS2ion Bio offers services related to vector development, cell line development, cloning, upstream development and optimization, and production of GLP material.