TOAC is a nitroxide spin-labeled C α,α-disubstituted glycine derivative that is effective β-turn and 3(10)/α-helix promoter in peptides. It is a very good rigid electron paramagnetic resonance probe and fluorescence quencher.一种用于肽合成的新型自旋标记氨基酸衍生物,通过 ESR 测定 TOAC 标记肽的二级结构.