Figure 4 - full size

Figure 4.
Fig. 4. Jaws. (A) Stereoview of structural elements constituting the jaws (left) and the location of these elements within pol II (right). (B) Mobility of the larger, NH[2]-terminal domain of Rpb5. Backbone models of free Rpb5 [gray (47)] and Rpb5 in pol II (pink) are shown with their smaller, COOH-terminal domains superimposed. (C) Conservation of amino acid residues of Rpb5.