High mobility group non-histone chromosomal proteins from the fruit fly Ceratitis capitata

Abstract 1. 1. Electrophoresis in acid-urea polyacrylamide gels of HMG proteins extracted from pharate adults of the fruit fly Ceratitis capitata by 5% perchloric acid and 0.35 M NaCl yields twelve main bands. 2. 2. The electrophoretic pattern of these proteins largely depends on the developmental stage of the insect. 3. 3. Some of the proteins so obtained behave like canonical HMG proteins from vertebrates when fractionated by CM-Sephadex chromatography or by the ethanol-HCl procedure.