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Analytical ultracentrifugation of VP1-Z pentamers. The sedimentation velocity of VP1-Z (30,000 rpm, 20°C) was determined at a protein concentration of 0.45 mg/mL. Scans were taken every 10 min (displayed are every 20 min). Quantitative analysis yielded a value of s(w,20) = 7.8 S.
