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Figure 7
Background-subtracted axial intensity profiles in the resting and contracting states that were obtained by radial integration of the intensities within the region 2.5 × 10−3–7.3 × 10−3 Å−1 (a and c) where the paramyosin reflections of the second-order Bessel function are seen, and the region 0–3.2 × 10−3 Å−1 (b and d) where the paramyosin reflections of the first-order Bessel function are seen. The abscissa Z shows the axial distance from the equator in the reciprocal space. The vertical bars show reflections from the thick filaments, and the arrows show the 51 and 59 Å reflections from the thin filaments. The spacings of these reflections are slightly elongated during contraction. The profiles in (a) and (c) show an overlap between the 15th (51 Å) thin-filament reflection and the 14th (51 Å) paramyosin reflection, and those in (b) and (d) show neighbouring peaks of the 13th (59 Å) thin-filament reflection and the 12th (60 Å) paramyosin reflection.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 6| Part 2| March 1999| Pages 93-100
doi:10.1107/S0909049598015544
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