Table 1. RMSD with chain based alignments.

Ubc9-SUMO-E3 complex	Ubc9 rmsd (Å)	SUMO rmsd (Å)
	aligned on Ubc9	aligned on SUMO	aligned on Ubc9
Representative Structure 1	1.28	0.95	1.80
Representative Structure 2	1.31	1.42	2.25
Representative Structure 3	1.19	1.30	2.47
Representative Structure 4	1.23	1.60	2.75