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. Author manuscript; available in PMC: 2013 Apr 1.
Published in final edited form as: Biochim Biophys Acta. 2011 Dec 8;1818(4):942–950. doi: 10.1016/j.bbamem.2011.11.035

Figure 1.

Figure 1

Hydrogen bonds (H bonds) interconnect TM helices. (A) Schematic representation of TM H-bond interconnections with TM helices depicted as cartoons, and H bonds as dashed lines. One or more H bonds can interconnect pairs of TM helices. Note that TM2 is a connectivity node; it interconnects the TM1-TM2-TM3-TM4 and TM5-TM6-TM7 segments of the protein. (B) Interconnectivity map of the SecYEG protein translocon. Note that TM3 connects the gate helices TM2 and TM7 to other regions of the translocon. Panel B is modified from Bondar et al. [11].