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The amino acid substitution A106V is responsible for fusion inhibition by gDB4.1. Mutations found in gDB4.1 were introduced into gDKa or repaired in gDB4.1 and tested in transfection fusion assays with gBKa, gHKa, and gLKa. Shown are mean values and standard deviations from three independent experiments, with results from cotransfections with gBKa, gDKa, gHKa, and gLKa set as 100%.
