Nano Archive

Construction of a laser combiner for dual fluorescent single molecule imaging of pRNA of phi29 DNA packaging motor

Zhang, Hui and Shu, Dan and Browne, Mark and Guo, Peixuan (2010) Construction of a laser combiner for dual fluorescent single molecule imaging of pRNA of phi29 DNA packaging motor. BIOMEDICAL MICRODEVICES, 12 (1). pp. 97-106. ISSN 1387-2176 (Print) 1572-8781 (Online)

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Official URL: http://www.springerlink.com/content/47849857m20338...

Abstract

A customized laser combiner was designed and constructed for dual channel single molecule imaging. The feasibility of a combiner-incorporated imaging system was demonstrated in studies of single molecule FRET. Distance rulers made of dual-labeled dsDNA were used to evaluate the system by determining the distance between one FRET pair. The results showed that the system is sensitive enough to distinguish between distances differing by two base pair and the distances calculated from FRET efficiencies are close to those documented in the literature. The single molecule FRET with the dual-color imaging system was also applied to reconstructed phi29 motor pRNA monomers. Finally, techniques for dual laser alignment and tuning of laser power for dual-color excitation are discussed.

Item Type:Article
Subjects:Biomedical Science > Nanobiotechnology
ID Code:8181
Deposited By:M T V
Deposited On:12 Feb 2010 14:19
Last Modified:12 Feb 2010 14:19

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