Figure 4From: The DNA relaxation activity and covalent complex accumulation of Mycobacterium tuberculosis topoisomerase I can be assayed in Escherichia coli: application for identification of potential FRET-dye labeling sitesSites of cysteine substitutions shown on structural model of MtTOP1 N-terminal transesterification domain. The active site tyrosine Y342 is also shown for reference.Back to article page