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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 3
BKCSDE 33(3)
March 20, 2012

Title	The Effect of the Oxygen Scavenging System on the pH of Buffered Sample Solutions: in the Context of Single-molecule Fluorescence Measurements
Author	Sung Eun Kim, Il Buem Lee, Seok-Cheol Hong*
Keywords	Oxygen scavenging system, pH, Single-molecule fluorescence, i-motif, Gloxy
Abstract	In single-molecule fluorescence experiment, the oxygen scavenging system is indispensable for avoiding photo-bleaching of fluorescent dyes. Here we report that the gloxy-based oxygen scavenging system commonly used in single molecule fluorescence experiments can disturb the solution pH considerably. To track in situ pH change, we utilized the pH-sensitive conformational transition of i-motif and examined the transition with ensemble and single-molecule FRET measurements. Based on our results, we also suggested several practical remedies for the stability of the solution pH.
Page	958 - 962
Full Text	PDF

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