Tanso Biosciences, Inc. has entered into a distributor agreement with Cosmo Bio Co., Ltd to provide contract assay services in Japan and contribute to expanding frontiers, accelerating research, and reducing risks of GPCR drug discovery. Its innovative functional assay is reliably sensitive to all the major Gα subtypes, including notoriously intractable G12/13, and opens up opportunities with ~300 GPCRs.