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. Author manuscript; available in PMC: 2014 Mar 11.
Published in final edited form as: J Mol Biol. 2012 Dec 26;425(5):886–901. doi: 10.1016/j.jmb.2012.12.011

Figure 8. Inter-domain distance is only consistent with a PAS dimer.

Figure 8

(A) Time domain signal and (B) corresponding probability distance distribution (P(r)) for spin-labeled Aer2 1–402 S183C. A sharp P(r) centered at 26.8Å is smaller than the diameter of a HAMP domain and fully consistent with the ferric Aer2 PAS dimer. (c) Model of MTSSL spin labeled Aer2 S183C PAS dimer. The dimer interface directs the two spin labels (blue) away from each other to add approximately 15Å to the S183 Cα-Cα atom distance.