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. Author manuscript; available in PMC: 2015 Apr 26.
Published in final edited form as: Cell Rep. 2015 Mar 26;11(1):61–70. doi: 10.1016/j.celrep.2015.03.003

Fig. 2.

Fig. 2

Inner and Outer cores of MtrF. (a) The inner core of MtrF, comprising TMs 1, 2, 5, 6 and 7 (colored slate), contributes to dimerization as well as formation of a frame-like structure housing the outer core of the protomer. The outer core of MtrF is composed of TMs 3, 4, 8, 9 as well as HPs 1 and 2 (colored yellow). (b) The outer core of MtrF forms a channel (colored purple) spanning approximately from the middle of the inner membrane up to the periplasmic space. This channel was calculated using the program CAVER (http://loschmidt.chemi.muni.cz/caver). The secondary structural elements of the MtrF protomer are in yellow. Residues D193, S417, W420, P438, R446, D449, and P457 are in green sticks.