Comparative sensitivity of alternative single-strand conformation polymorphism (SSCP) methods

Biotechniques. 1994 Sep;17(3):490-2, 494, 496.


Single-strand conformation polymorphism (SSCP) analysis is a genetic screening technique that allows for the rapid detection of single nucleotide substitutions in fragments of PCR-amplified genomic DNA or cDNA. Several alternative protocols are now being commonly used to resolve differences in electrophoretic mobility of single-stranded DNA fragments. The aim of this study was to directly compare the sensitivity of three popular SSCP methods using a panel of 19 known human mutations/polymorphisms present in genomic DNA samples. Using a single electrophoresis protocol, 95% of the mutations were detected using small-format PhastGel and the PhastSystem. Large-format gels (5% polyacrylamide and Hydrolink-MDE) were tested both with and without the addition of 10% glycerol. The sensitivity for polyacrylamide and Hydrolink-MDE gels without glycerol was 89% and 79%, respectively, and 68% or 63%, respectively, for glycerol-containing gels. However, all mutations were detected with either polyacrylamide or Hydrolink-MDE when both glycerol and non-glycerol gels were examined. We conclude that comparable very high detection efficiency can be achieved using the PhastSystem or by using a combination of two large-gel conditions with either polyacrylamide or Hydrolink-MDE.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.
  • Technical Report

MeSH terms

  • Humans
  • Polymorphism, Single-Stranded Conformational*
  • Sensitivity and Specificity