A simplified approach to capillary electrophoretic separation of polymerase chain reaction fragments of forensic interest

Vincenzo Lorenzo Pascali, G. Manetto, F Crivellente, F. Tagliaro, S. Turrina

Risultato della ricerca: Contributo in rivistaArticolo in rivista

2 Citazioni (Scopus)

Abstract

We report a sensitive and low-cost capillary electrophoretic typing method and its application to a short tandem repeat system widely used in forensic identification (HUMCD4). Separations are carried out with internally coated 100 μm fused-silica capillaries filled with a noncrosslinked gel sieving matrix based on 1.50-1.75 hydroxyethylcellulose. Detection was by laser-induced fluorescence detection. As running buffer, 100 mM Tris-borate with 0.1 mM EDTA, pH 8.7, was used. Samples were simply diluted (≤ 1:10 in water) prior to separation. Both electrokinetic injection and analytical separation were carried out at -180 V/cm. The method enabled separation of HUMCD4 alleles, with fair precision in terms of absolute and relative migration times (R.S.D.s of 0.22% and 0.04%, respectively, in intraday tests). The average accuracy of CD4 fragment sizing was 0.218 base pairs. These results confirmed the high suitability of capillary electrophoresis as a screening method for small-size DNA polymorphisms.
Lingua originaleEnglish
pagine (da-a)259-268
Numero di pagine10
RivistaForensic Science International
Volume92
Stato di pubblicazionePubblicato - 1998

Keywords

  • CD4
  • Capillary electrophoresis
  • LIF
  • PCR
  • STRs

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