Fig. 1From: Heterogeneous expression of DnaK gene from Alicyclobacillus acidoterrestris improves the resistance of Escherichia coli against heat and acid stressSingle-colony PCR analysis of recombinant E. coli BL21-DnaK. Lane M DNA marker DL2000; lane 1 negative control; lanes 2–4 single-colony PCR products of recombinant E. coli BL21–DnaKBack to article page