Premium
Improved conditions for the analysis of large variable number of tandemly repeated (VNTR) unit polymorphisms
Author(s) -
Vandenbroeck Koen,
Consiglio Antonella,
Martino Gianvito,
Grimaldi Luigi M. E.
Publication year - 1996
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.1150170409
Subject(s) - ethidium bromide , microbiology and biotechnology , agarose gel electrophoresis , gel electrophoresis of nucleic acids , genomic dna , dna , polymerase chain reaction , biology , gel electrophoresis , agarose , multiple displacement amplification , staining , genetics , gene , dna extraction
Large variable number of tandemly repeated (VNTR) unit polymorphisms were identified by amplification of genomic DNA with appropriate primers, followed by agarose gel electrophoresis and ethidium bromide staining. However, when genomic DNA was extracted using paramagnetic beads, we found that the efficiency of polymerase chain reaction amplification of VNTR's was affected by the purity of the solid phase‐eluted DNA. Here we report that VNTR's located in the human interleukin‐1 receptor antagonist and interleukin‐4 genes are clearly and reliably amplified only when more stringent conditions are used in order to obtain purer DNA eluates from DNA‐bead complexes. In addition, polyacrylamide gel electrophoresis followed by silver staining is superior to ethidium bromide staining of agarose gels in visualizing the different allelic bands of heterozygous carriers.