Multispan Inc. We are a biotech company focusing exclusively on drug discovery research targeting GPCRs. We have created the industry's largest collection of human GPCR clones and GPCR-expressing cell lines for HTS including the proprietary HEx TM series of High Expression cell lines. We also offer custom compound profiling, cell line generation, antibody development and frozen cell and membrane preparation, with scientific consultations from assay design to implementation.