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. Author manuscript; available in PMC: 2012 Feb 9.
Published in final edited form as: Structure. 2011 Feb 9;19(2):192–202. doi: 10.1016/j.str.2010.12.013

Figure 4.

Figure 4

Polar Interactions Stabilize the SPNct-IFS Complex. A. SIL1 inserts into the active site pocket of SPN and make numerous hydrogen-bonding and electrostatic interactions. B. SIL2 makes hydrogen-bonding interactions on the rim that forms part to the active site of SPN.