Synthesis and photochemistry of pH-sensitive GFP chromophore analogs
作者:Alan R. Katritzky、Megumi Yoshioka-Tarver、Bahaa El-Dien M. El-Gendy、C. Dennis Hall
DOI:10.1016/j.tetlet.2010.12.082
日期:2011.4
GFP chromophore analogs (7a–e, 8, and 10a,b) containing 2-thienyl-, 5-methyl-2-furyl-, 2-pyrryl, and 6-methyl-2-pyridyl-groups were synthesized and their fluorescence spectra recorded in the pH range 1–7. NMR studies showed that protonation of 8 (2-thienyl system) inhibited photoisomerization (Z–E) about the exocyclic double bond but that protonation of 7c (E + Z) (2-pyrryl system) gave only 7cE. Fluorescence