The pH, temperature and salt dependence of the
Sulfolobus solfataricus recombinant WT amidase
oligomerization process assessed by analytical centrifugation.
Experiments were conducted at 117,000 g after
overnight incubation at about 0.5 mg ml–1 at
the indicated pH and temperature. Each trace refers to a
different experiment. Experiments conducted at 4 (A), 20 (B) and
36 (C) °C in 20 mM sodium phosphate pH 6.0 (black), 7.0
(blue) and 8.0 (red). Experiments conducted in 20 mM sodium
phosphate pH 6.0 (D), 7.0 (E) and 8.0 (F) at 4 (black), 20
(blue), and 36°C (red). Experiments conducted at 4 (G), 20
(H), and 36°C (I) in 20 mM sodium phosphate pH 6.0 in the
presence (black) or in the absence (red) of 1 M NaCl.