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. 2019 Jul 7;9(7):260. doi: 10.3390/biom9070260

Figure 3.

Figure 3

Structure model of the hook. (A) Two turns of the hook model. Eleven FlgE subunits along the one start helix are shown. Each subunit is colored from blue to red through the rainbow spectrum from the N to C terminus. Upper panel, viewed from the distal end; middle panel, side view; lower panel, viewed from the proximal end. (B) Subunit interaction of the D1 and the l-stretch in the hook. Six subunits in three adjacent protofilaments (two subunits from each protofilament) are shown. The number counted from the subunit 0 along the 1-start helical line is shown above or below each subunit. Left panel, view from the outside; right panel, view from the inside of the hook. (C) (D) Close up view of the L-stretch in the hook. The region in the black and red boxes in (B) are shown in (C) and (D), respectively. Molecular figures were drawn using MolFeat (Ver 3.6, FiatLux Corporation).