Figure 2.

Phosphorylation sites of Pol I. Positions of the identified Pol I phosphorylation sites in the primary structure of the five phosphorylated subunits. Phosphorylation sites marked with an asterisk were confirmed by proteome-wide, large-scale phosphorylation analyses (see text). Sites identified exclusively by proteome-wide analyses are marked by a triangle. The domain organization of the subunits and the positions of amino acid exchanges of known Pol I mutants are shown, as well as a part of the secondary structure of A43. References: [1] (22); [2] (24); [3] (9); [4] (53); [5] (23); [6] (54); [7] (7); [8] (55); [9] (10); [10] (45); [11] (15).