FIG. 2.

MPA resistance conferred by different forms of Rpb9. (A) MPA resistance of rad16 rad26 and rad16 rad26 rpb9 cells. (B) MPA resistance of rad16 rad26 rpb9 cells transformed with plasmids encoding full-length (residues 1 to 122), truncated (numbers indicate residues remaining), and mutated (cysteines replaced with serines) Rpb9. Sequential 10-fold serial dilutions of yeast cells were spotted onto SD plates containing different concentrations of MPA and incubated for 6 days before being photographed.