High-speed analysis of multiplexed short tandem repeats with an electrophoretic microdevice |
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Authors: | Mitnik Luba Carey Loucinda Burger Robert Desmarais Samantha Koutny Lance Wernet Oliver Matsudaira Paul Ehrlich Daniel |
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Institution: | Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA. |
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Abstract: | We report the development of a robust and effective method for multiplexed short tandem repeat (STR) analysis within a chip-based microdevice. The method uses a laser-induced fluorescence detection system and simultaneously detects three- and four-color multiplexed polymerase chain reaction (PCR) samples. Analyses of the eight combined DNA index system (CODIS) STR loci were performed in 20 min with single-base-pair resolution ranging from 0.75 to 1. A simultaneous analysis of fifteen loci-ladders and a gender marker Amelogenin based on the PowerPlexTM 16 System was achieved in less than 35 min. The system is capable of repetitive operation and may be extended to high-throughput multilane devices that could be readily interfaced to an automated sample loading system. |
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