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Contour plots of the ME orientation distributions (β, γ) of the LCD in relaxation (A), active contraction (B), and rigor (C), calculated from the 〈P2〉 and 〈P4〉 data in Fig. 3 using the crystal structure of nucleotide-free chicken skeletal myosin (1). Hotter colors indicate a higher probability of that orientation. The pink square in C denotes the orientation of actin-attached chicken skeletal myosin in the absence of ATP (2).
