fingerprinting separate: POLYPEPTIDES ALL AMINO ACIDS NUCLEOTIDES MANY OTHER COMPOUNDS y” ELECTROPHORESIS IN ONE DIMENSION Y > ¥ ' > ™ on 1814” x 2214.” sheets of filter paper (Chromatography may be done in second dimension). Many complex mixtures can be rapidly resolved by electrophoresis in one dimension on papers up to 4 feet long. Developed in the Laboratory of Cellular Physiology and Metabolism, National Heart Institute, National Institutes of Health, Bethesda, Maryland. Special thanks are due to Dr. William J. Dreyer, whose co-operation and suggestions are gratefully acknowledged by Gilson Medical Electronics. * Easy loading with folding rack * Safety features: Strong, joint-free fiberglass tank eliminates elecv trical and fluid leaks Kk 5,000 volts at 300 ma. Paper immersed in bifurcated fiberglass tank con- taining Varsol * Varsol, a light petroleum fraction, has a high flash point (over 100° F.), does not conduct electricity, and has the proper degreeof volatility Cold tap water run through stainless steel coils at top of tank is only coolant necessary High voltage connected to inside of tank by Nylon ¥ and stainless steel plugs attached to edge of tank Highly reliable interlock provided by am extension v of the cover handle When cover is removed, high voltage is ipso facto ¥ turned off No capacitors to sneakily store electricity in apv paratus rn Poh. at B PT GILSON MEDICAL ELECTRONICS Middleton, Wisconsin 53562 + Telephone 608/836-1551 GILSON products are also manufactured in Europe: GME + 69, Rue Gambetta — 95, Villiers-Le-Bel, FRANCE