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SDS–PAGE analysis of the purified BseMII endonuclease (lane 1) with size standards (lane 2) as follows: (a) α2-macroglobulin (170 kDa), (b) β-galactosidase (116.4 kDa), (c) fructose-6-phosphate kinase (85.2 kDa), (d) glutamate dehydrogenase (55.6 kDa) and (e) aldolase (39.2 kDa).
