ZWINGENBERG & BERGKAMEN, Germany--(BUSINESS WIRE)--BRAIN AG, an European leader in white biotechnology and the global top 10 pharmaceutical corporation Bayer Schering Pharma AG co-operate in the field of production process optimisation of steroid compounds. The goal of the collaboration is the energy-efficient and thus sustainable fermentative production of steroid compounds using optimised microbial production strains taking plant derived raw materials as starting material.