DNA repair and global sumoylation are regulated by distinct Ubc9 noncovalent complexes.
Prudden J, Perry JJ, Nie M, Vashisht AA, Arvai AS, Hitomi C, Guenther G, Wohlschlegel JA, Tainer JA, Boddy MN. Mol Cell Biol. 2011 Jun; 31(11):2299-310. Epub 2011 Mar 28.