The Epics XL has an air-cooled argon-ion laser giving laser light at 488 nm. Mithramycin/DNA has an excitation maximum of 459 nm and it is usually excited by the 457 nm line from a water-cooled argon ion laser. You will either have to sue a flow cytometer with a tunable argon-ion laser or choose a different DNA dye. Michael Ormerod 34 Wray Park Road Reigate RH2 ODE Telephone: voice & FAX: (0)1737 241726 Web site: http://ourworld.compuserve.com/homepages/Michael_Ormerod
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