根拠: gel filtration, The wild type enzyme was showed a single band of 63 kDa on SDS-PAGE. This molecular mass was consistent well with estimated values from the amino acid sequence (65 kDa) and ...根拠: gel filtration, The wild type enzyme was showed a single band of 63 kDa on SDS-PAGE. This molecular mass was consistent well with estimated values from the amino acid sequence (65 kDa) and size exclusion column chromatography (62 kDa), indicating that dNAtTRE1 was also a monomeric protein under nondenaturing conditions.