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. 2015 Dec 16;6:10172. doi: 10.1038/ncomms10172

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(a) The amino acid sequence of KdHpuA with secondary structure elements (identified by Stride68) labelled beneath and coloured from blue at the N terminus to red at the C terminus, and boxes indicating the loop regions mentioned in the text. Portions of the sequence not visible in the electron density are indicated by dashes beneath the sequence. (b) Cartoon representation of the structure showing secondary structure elements (coloured as in a) and labelling the prominent loops, as well as the N and C termini. (c) A 90° rotation of b about the x-axis, allowing visualization of loops 2, 3 and 4.