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Integrated Portable Polymerase Chain Reaction-Capillary Electrophoresis Microsystem for Rapid Forensic Short Tandem Repeat Typing

Authors
 Peng Liu  ;  Tae Seok Seo  ;  Richard A. Mathies  ;  James R. Scherer  ;  Kyoung-Jin Shin  ;  Nathaniel Beyor 
Citation
 ANALYTICAL CHEMISTRY, Vol.79(5) : 1881-1889, 2007 
Journal Title
ANALYTICAL CHEMISTRY
ISSN
 0003-2700 
Issue Date
2007
Abstract
A portable forensic genetic analysis system consisting of a microfluidic device for amplification and separation of short tandem repeat (STR) fragments as well as an instrument for chip operation and four-color fluorescence detection has been developed. The microdevice performs polymerase chain reaction (PCR) in a 160-nL chamber and capillary electrophoresis (CE) in a 7-cm-long separation channel. The instrumental design integrates PCR thermal cycling, electrophoretic separation, pneumatic valve fluidic control, and four-color laser excited fluorescence detection. A quadruplex Y-chromosome STR typing system consisting of amelogenin and three Y STR loci (DYS390, DYS393, DYS439) was developed and used for validation studies. The multiplex amplification of these 4 loci with 35 PCR cycles followed by CE separation and 4-color fluorescence detection was completed in 1.5 h. All the amplicons can be detected with a limit of detection of 20 copies of male standard DNA in the reactor. Real-world forensic analyses of oral swab and human bone extracts from case evidence were also successfully performed. Mixture analysis demonstrated that a balanced profile can be obtained even at a male-to-female template ratio of 1:10. The successful development and operation of this portable PCR−CE system establishes the feasibility of rapid point-of-analysis DNA typing of forensic casework, of mass disaster samples or of individuals at a security checkpoint.
Full Text
http://pubs.acs.org/doi/abs/10.1021/ac061961k
DOI
10.1021/ac061961k
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Forensic Medicine (법의학과) > 1. Journal Papers
Yonsei Authors
Shin, Kyoung Jin(신경진) ORCID logo https://orcid.org/0000-0002-1059-9665
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/95587
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