2,2,6,6-Tetramethylpiperidine-N-oxyl-4-amino-4-carboxylic Acid from Aladdin Scientific Corporation

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.A novel spin-labeled amino acid derivative for use in peptide synthesis,determination of TOAC-labeled peptide secondary structure by ESR