Figure 5.

Fitting of a post rigor myosin head conformation into the relaxed Lethocerus thick filament. The atomic model of Doryteuthis pealeii (squid), PDB 3i5f, a post-rigor conformation [82] fit using only the RLC portion of the lever arm onto the free head of atomic model of [6]. Arrows point to the space between the free head and the myosin rods in the backbone; there are no clashes between the MD and the backbone. The related rigor-like structure, PDB 3i5g, fits equally well. The degree of clash observed with other post rigor crystal structures having complete lever arms, e.g., 2mys and 1dlf, fit using the same criterion is variable. Coloring scheme has the RLC (orange), ELC (green) and heavy chain (purple). Note that the blocked head density and atomic model have been removed for clarity.