title: Enhancing solid phase synthesis by a noncovalent protection strategy-efficient coupling of rhodamine to resin-bound peptide nucleic acids.
abstract: Resins for solid-phase synthesis can affect coupling efficiencies by interacting with reactants. We have observed that polyethylene glycol-polystyrene (PEG-PS) solid support absorbs added activated fluorophores, preventing efficient labeling of peptide nucleic acids (PNAs). We now report that addition of an inexpensive unactivated fluorophore blocks the resin and allows efficient labeling. This protection strategy may have general benefits for peptide and combinatorial synthesis.
authors.affiliation: Howard Hughes Medical Institute, Department of Pharmacology, University of Texas Southwestern Medical Center at Dallas, 75235-9041, USA.
authors.forename: L D
authors.initials: LD
authors.lastname: Mayfield
authors.forename: D R
authors.initials: DR
authors.lastname: Corey
mesh_terms: D001483:Base Sequence; D020135:Peptide Nucleic Acids / Q000737:chemistry*; D012235:Rhodamines / Q000737:chemistry*
chemical_list: D020135:Peptide Nucleic Acids; D012235:Rhodamines