BJS

BJS Biotechnologies was a UK diagnostics and instrumentation company focused on ultrafast thermal cycling technology for polymerase chain reaction testing. The company developed the xxpress qPCR thermal cycler and related consumables, and later operated under the name Fast MDx to commercialize a low-cost, high-throughput molecular diagnostic testing platform. Its offerings were aimed at research and molecular diagnostics applications, including rapid sample-to-result workflows rather than therapeutic drug development. The legal entity BJS Biotechnologies Limited was dissolved in March 2025, although the Fast MDx brand and website have continued to present an active diagnostics offering at the same Greenford address. The business appears to sit at the intersection of life science tools, in vitro diagnostics, and laboratory automation.