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(A) Constant-current image showing several GOD molecules on mica substrates treated with phosphate buffer. The images were recorded with a W tip in humid air (80% RH at 25°C). The reference current was 1 pA at a tip bias of 1.5 V. (B) Cα tracing of the dimer structure of a GOD molecule (20). Contacts between molecules forming the dimer are confined to a long, narrow stretch.
