... 40 mm aminocaproic acid, 15 mmp-aminobenzamidine, 5 mm MgCl2, 0.1 mm EDTA,0.2 mm dithiothreitol, 0.8% soybean phosphatidyl choline,1.5% octyl glucoside, 0.5% sodium cholate, 0.5% sodiumdeoxycholate, ... 6.5, 100 mm KCl, 5 mmMgCl2,1mm ADP, 2 lm valinomycin), and the lumines-cence was followed using a luminometer (Glomax, Promega,Conformations of the ATPase ion-binding pocket T. Vorburger ... cytoplasm. In order to gain insight into the interaction of thestator arginine with the binding site, we modeled astretch of seven amino acids of helix 4 of subunit ainto the c-ring structure and...