Copyright information:Taken from "Molecular recognition of DNA base pairs by the formamido/pyrrole and formamido/imidazole pairings in stacked polyamides"Nucleic Acids Research 2005;33(3):912-921.Published online 9 Feb 2005PMCID:PMC549405.© The Author 2005. Published by Oxford University Press. All rights reserved The SPR responses are normalized such that = RU/RU. Data were fit by (([triamide]) + (2[triamide]))/(1 + ([triamide]) + ([triamide])); where triamide concentrations are reported in molarity and represent the free (unbound) concentration.