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. 2002 Feb;11(2):262–270. doi: 10.1110/ps.32602

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Fig. 1. — (A) Organization of the [(Pro-Pro-Gly)₁₀]₃ triple helices in the ac plane. Chains are colored with a ramping code from blue (N-termini) to red (C-termini). The two molecules in the asymmetric unit are the top-center (molecule 1) and the bottom-center (molecule 2) molecules. (B) Average model obtained in the subcell approximation (Vitagliano et al. 2001a) in the ac` plane. The c` corresponds to a ninth of the full-length c axis. (C) Electron density map (2Fo-Fc), extended to the whole unit cell, contoured at 2.0 σ. (D) Omit map (Fo-Fc) of a representative triplet contoured at 3.5 σ.

Fig. 1. — (A) Organization of the [(Pro-Pro-Gly)₁₀]₃ triple helices in the ac plane. Chains are colored with a ramping code from blue (N-termini) to red (C-termini). The two molecules in the asymmetric unit are the top-center (molecule 1) and the bottom-center (molecule 2) molecules. (B) Average model obtained in the subcell approximation (Vitagliano et al. 2001a) in the ac` plane. The c` corresponds to a ninth of the full-length c axis. (C) Electron density map (2Fo-Fc), extended to the whole unit cell, contoured at 2.0 σ. (D) Omit map (Fo-Fc) of a representative triplet contoured at 3.5 σ.