Profile: Amersham Biosciences manufactures biopharmaceuticals & products for drug discovery, genomics and proteomics. We offer products such as proteornics, bioprocess, DNA synthesis spectrophotometry, professional services, electrophoresis, drug screening cellular, cloning & enzymes, cell preparation & processing. We render scientists with the tools to investigate the genetic and molecular basis for human development & disease. Our G1S cell cycle phase marker assay is used in conjunction with the G1S cell cycle phase marker cell cycle trafficking analysis module & is possible to distinguish up to four stages of the cell cycle G0/G1, S, G2 and M.