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Analytical ultracentrifugation results for purified CS2 hydrolases from A. thiooxidans strains S1p and G8, fitted as the concentration distribution (c) (arbitrary units) of sedimentation coefficients (s) in Svedberg units (S). For strain G8 (solid line), two species are observed, corresponding to octamers (at 8.3 S) and hexadecamers (13 S). For strain S1p (dashed line), only one peak was observed, corresponding to an octameric form of the enzyme.
