Figure 1
SDS–PAGE of purification of the recombinant LjD-LDH protein. Lane 1, molecular-weight markers (labelled in kDa). Lanes 2–8 show the purification procedure of LjD-LDH using Ni–NTA chromatography. Lane 2, whole cell extract; lanes 3 and 4, supernatant and pellet fraction after centrifugation of whole cell extract, respectively; lane 5, flowthrough from the Ni–NTA column; lanes 6 and 7, washes with 5 and 10 mM imidazole, respectively; lane 8, elution with 300 mM imidazole. The 6×His LjD-LDH protein is indicated on the right side of the gel. |