Figure 2.

Activity of the yeast small subunit. (A) Specific activity of the H₆Rnr2p/Rnr4p complex (1 μg) in the presence of increasing amounts of Rnr1p. The specific activities were calculated per milligram of H₆Rnr2p in the complex. (B) Activities of 2 μg of the H₆Rnr2p/Rnr4p complex (○, left y axis) and of a mixture of 1 μg of H₆Rnr2p and 1 μg of Rnr4p (●, right y axis), both times with 5 μg of Rnr1p. (C) Specific activities of the H₆Rnr2p/Rnr4p complex (solid bars, right y axis) and of a H₆Rnr2p and Rnr4p mixture (hatched bars, left y axis) in a yeast RNR assay at different temperatures.