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Stereographic images of the backbone of the CrrY1–4 structure and of a portion of the CrrY1–4 crystal electron density. (a) shows the backbone of CrrY1–4 coloured in rainbow colours: blue to red from the N-terminus to the C-terminus. (b) shows a representative sample of the electron density contoured at 1.0σ around Phe180. A few residues are labelled. This figure was made using PyMOL (DeLano, 2002 ▶).
