Biological detection and tagging using tailorable, reactive, highly fluorescent chemosensors.

Shepodd, Timothy J. ; Zifer, Thomas ; McElhanon, James Ross ; Rahn, Larry A.

Sandia National Laboratories

关键词: Chemical Sensors.;    Biological Detection.;    Amino Acids;    Fluorescence;    59 Basic Biological Sciences;   

DOI  :  10.2172/895704
RP-ID  :  SAND2006-6743
RP-ID  :  AC04-94AL85000
RP-ID  :  895704

美国|英语

来源: UNT Digital Library

【 摘 要 】

This program was focused on the development of a fluorogenic chemosensor family that could tuned for reaction with electrophilic (e.g. chemical species, toxins) and nucleophilic (e.g. proteins and other biological molecules) species. Our chemosensor approach utilized the fluorescent properties of well-known berberine-type alkaloids. In situ chemosensor reaction with a target species transformed two out-of-plane, weakly conjugated, short-wavelength chromophores into one rigid, planar, conjugated, chromophore with strong long wavelength fluorescence (530-560 nm,) and large Stokes shift (100-180 nm). The chemosensor was activated with an isourea group which allowed for reaction with carboxylic acid moieties found in amino acids.