Publication protocol
Genotyping was carried out through PCR amplification using specific primers (Forward: 5'-GTCATCTTCCTTGCCTGTTTAG-3'; Reverse: 5'-TTTCCACAAGGAGTTTTCAAGTT-3'), allowing amplification of a 228 bp within the sequence of the 13th exon. PCR amplification reactions were performed in a final volume of 25 µL containing 50 ng of genomic DNA, 200 nM of each primer, 0.2 mM of dNTPs (dATP, dTTP, dGTP, dCTP), 1 unit of Taq DNA polymerase, 2 mM of MgCl2, PCR buffer (KCl 50 mM, 2 mM MgCl2, Tris-HCl, pH 9.0) and sterile deionized water. The method was carried out in a Mycycler TM thermocycler (BioRad Laboratories Inc., Hercules, CA, USA) under the following temperatures scheme: initial denaturation at 98 °C for 3 min followed by 35 cycles consisting on 95 °C for 1 min (denaturation), 66 °C for 1 min (annealing) and 72 °C for 1 min (extension) with a final extension at 72 °C for 10 min. Amplification products were evaluated in a 2% agarose gel electrophoresis stained with ethidium bromide and visualized in an UV transilluminator. PCR products were submitted to enzymatic digestion with Eco47I (Fermentas, Lituania) in the following reaction conditions for a final volume of 15 µL: 1 unit of enzyme (0.1 µL), 1.5 µL of enzyme buffer, 7 µL of PCR product and sterile deionized water. Reactions were incubated at 37 °C for 12 h Digestion products were revealed by 2% agarose gel electrophoresis, subsequently stained with ethidium bromide and visualized using an UV transilluminator.
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