High-Resolution X-ray Diffraction of Muscle Using Undulator Radiation from the Tristan Main Ring at KEK

Wakabayashi, K.; Sugiyama, H.; Yagi, N.; Irving, T.C.; Iwamoto, H.; Horiuti, K.; Takezawa, Y.; Sugimoto, Y.; Ogino, M.; Iino, S.; Kim, D.-S.; Majima, T.; Amemiya, Y.; Yamamoto, S.; Ando, M.

doi:10.1107/S0909049597013861

Journal of Synchrotron Radiation Journal of
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Figure 6
Comparison of the calculated meridional intensities from the best-fit one-dimensional model in Fig. 5

and the observed ones. C: the C-protein reflection (including the M1 component). M1–M6: thick-filament-based reflections with the 42.9 nm repeat. Tn1–Tn3: reflections from troponin molecules on the thin filaments. The displacements of the crossbridge projecting levels in the triplets were assumed to be symmetrical. The shape of the function approximated for the crossbridge projection density was also assumed identical in the perturbed and regular regions. The structures of M-line, the titin/connectin molecule and the backbone were neglected. The discrepancy factor (R) for this comparison was ∼0.1. (R is defined as $[\sum_i|I_{\rm obs}(Z_i)-kI_{\rm calc}(Z_i)|/\sum_i|I_{\rm obs}(Z_i)]$ , where I_obs and I_calc denote the observed and calculated intensities, Z_i, the axial coordinate and k [= $[\sum_iI_{\rm obs}(Z_i)/\sum_iI_{\rm calc}(Z_i)]]$ is the scale factor.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 5| Part 3| May 1998| Pages 280-285

https://doi.org/10.1107/S0909049597013861

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