5/3/2023 0 Comments Dwell lab scope coil![]() Although each of the three catalytic binding sites in (αβ) 3 catalyzes the same set of partial reactions in the time average, they might not be fully equivalent at any moment, because the structural symmetry is broken by contact with b 2δ in F 1 and with b 2 a in F O. However, symmetry is broken by the b 2 homodimer, which together with subunit δ a, forms a single eccentric stalk connecting the membrane embedded F O domain with the soluble F 1 domain, and the central rotating and curved stalk composed of subunit γε. Subunits c 10 or (αβ) 3 alone are rotationally symmetric. In Escherichia coli, the enzyme consists of rotor subunits γε c 10 and stator subunits (αβ) 3δ ab 2. ![]() F-ATP synthases use proton flow through the F O domain to synthesize ATP in the F 1 domain. ![]()
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