The Pennsylvania Green Fluorophore: A Hybrid of Oregon Green and Tokyo Green for the Construction of Hydrophobic and pH-Insensitive Molecular Probes
作者:Laurie F. Mottram、Siwarutt Boonyarattanakalin、Rebecca E. Kovel、Blake R. Peterson
DOI:10.1021/ol052655g
日期:2006.2.1
Fluorescent small molecules are powerful tools for exploring cellular biology. As a more hydrophobic, photostable, and less pH-sensitive alternative to fluorescein, we synthesized Pennsylvania Green, a bright, monoanionic fluorophore related to Oregon Green and Tokyo Green. Comparison of membrane probes comprising N-alkyl-3 beta-cholesterylamine linked to 4-carboxy-Tokyo Green (pK(a) similar to 6.2) and 4-carboxy-Pennsylvania Green (pK(a) similar to 4.8) revealed that only Pennsylvania Green was highly fluorescent in acidic early and recycling endosomes within living mammalian cells.