Introductory Contents Further reading Units 	Introduction  The flow cytometer 	Data analysis 	Immunofluorescence 	Some clinical applications  DNA and the cell cycle  Assignment                    Appendix Figure 6.9. Light scatter from nuclei from a formalin-fixed section of a sarcoma. PI stain. The DNA histogram has been gated on Region One. Data supplied by José Lopes, Alexandre Salvador and Filipe Sansonetty, IPATIMUP, Porto, Portugal. continued