Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Ultra-fast Detection and Differentiation of Mycoplasma haemofelis and Candidatus M. Haemominutum in Korean Feral Cats by Microchip Electrophoresis with Programmed Field Strength Gradients

  • Kumar, Kailasa S. (Department of Chemistry and Basic Science Research Institute, Chonbuk National University) ;
  • Lee, Hee-Gu (Cellomics Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Yoo, Dong-Jin (Department of Chemistry, Seonam University) ;
  • Kang, Seong-Ho (Department of Chemistry and Basic Science Research Institute, Chonbuk National University)
  • Published : 2008.01.20
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Abstract

A microchip-based capillary gel electrophoresis (MCGE) technique was developed for the ultra-fast detection and differentiation of Candidatus Mycoplasma haemominutum (Candidatus M. haemominutum, California strain) and Mycoplasma haemofelis (M. haemofelis, Ohio strain) in Korean feral cats through the application of programmed field strength gradients (PFSG) in a conventional glass double-T microchip. The effects of the poly (ethyleneoxide) (PEO) concentration and electric field strength on the separation of DNA fragments were investigated. The PCR-amplified products of Candidatus M. haemominutum (202-bp) and M. haemofelis (273-bp) were analyzed by MCGE within 75 s under a constant applied electric field of 117.6 V/cm and a sieving matrix of 0.3% PEO (Mr 8 000 000). When the PFSG was applied, MCGE analysis generated results 6.8-times faster without any loss of resolution or reproducibility. The MCGE-PFSG technique was also applied to eleven samples selected randomly from 33 positive samples. The samples were detected and differentiated within 11 s. The analysis time of the MCGE-PFSG technique was approximately 980-times faster than that using conventional slab gel electrophoresis.

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