Fig. 2From: The H2TH-like motif of the Escherichia coli multifunctional protein KsgA is required for DNA binding involved in DNA repair and the suppression of mutation frequenciesThree types of recombinant KsgA and their purification. (a) Domain organization of full-length KsgA, KsgA (1-213), and KsgA (9-273). (b) Purification of E. coli full-length KsgA, KsgA (1-213), and KsgA (9-273). Escherichia coli BL21(DE3) carrying pET21a (+)-KsgA, pET21a (+)-KsgA (1-213), or pET21a (+)-KsgA (9-273) was induced by 0.1 mM IPTG at 20 °C for 16 h. Proteins were separated by 0.1% SDS-12% PAGE and stained with Coomassie Blue. Lane 1, molecular weight marker; lane 2, purified His-KsgA (19.5 μg); lane 3, purified His-KsgA (1-213) (7.3 μg); lane 4, His-KsgA (9-273) (85.3 μg)Back to article page