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. 1997 Jan 27;136(2):331–343. doi: 10.1083/jcb.136.2.331

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Hydrodynamic bead models of the Arp2/3 complex. Models assume five rigidly linked, identical 4.52-nm-diam spheres, each with a partial specific volume of 0.74 cm³/gm. Each model, thus, has a molecular mass of 197 kD. The partial specific volume and hydration (0.323 g/g) used in all calculations were based on amino acid analysis. Hydrodynamic parameters for each configuration were calculated by the method of Riseman and Kirkwood (1956). (A) Globular, double-tetrahedral arrangement, 10.3 S. (B) Linear model, 8.1 S. (C) Open horseshoe-shaped model, 8.7 S. (D) Compact horseshoe-shaped model, 9.5 S. The best agreement with experimental data was given by model C.