The PCR products of both systems were sequenced. For DNA sequencing reaction, the fl uorescence-labeled didesoxynucleotide technology (Applied Biosystems, Darmstadt, Germany) was used. The sequenced fragments were separated, and the data were collected with an ABI PRISM 310 Genetic Analyzer (Applied Biosystems). The obtained sequences were then analyzed and compared by using BLAST (www. ncbi.nlm.nih.gov/BLAST).