Figure 6:

Crystal of the Mycobacterium tuberculosis β’ subunit (rpoC), represented by its secondary structure. The β sheets and α helices are shown in green, while loops are colored gray. Different types of mutations are shown in different colors, as follows: Blue for the putative compensatory mutations found in our study, red for previously reported compensatory mutations, yellow for mutations reported in the literature and also found in our study, and magenta for mutations found in this study that had another amino acid change (for the same position) reported in the literature. All the mutations are represented as Van der Waals spheres (alpha carbon only, radius scale = 1.4 Å). The arrows indicate the direction of the rotation of the protein along the Y axis