Brazilian Journal of Medical and Biological Research
On-line version ISSN 1414-431X
PINHEIRO, N.A.; MOURA, R.P.; MONTEIRO, E. and VILLA, L.L.. Detection of point mutations by non-isotopic single strand conformation polymorphism. Braz J Med Biol Res [online]. 1999, vol.32, n.1, pp.55-58. ISSN 1414-431X. http://dx.doi.org/10.1590/S0100-879X1999000100008.
We have developed a procedure for nonradioactive single strand conformation polymorphism analysis and applied it to the detection of point mutations in the human tumor suppressor gene p53. The protocol does not require any particular facilities or equipment, such as radioactive handling, large gel units for sequencing, or a semiautomated electrophoresis system. This technique consists of amplification of DNA fragments by PCR with specific oligonucleotide primers, denaturation, and electrophoresis on small neutral polyacrylamide gels, followed by silver staining. The sensitivity of this procedure is comparable to other described techniques and the method is easy to perform and applicable to a variety of tissue specimens.
Keywords : p53 gene; human papillomavirus; PCR; SSCP; cancer; silver staining.