Successful PCR amplifications were
purified by incubating with 10U exonuclease I and 2U shrimp alkaline
phosphatase (Fermentas International, Inc.) for 15 min at 37 ◦C
followed by 15 min at 80 ◦C. The purified products were sequenced
in both directions using a BigDye Terminator v3.1Cycle Sequencing
Kit (Applied Biosystems, Foster City, California, USA). Sequencing
reactions were then run through an ABI DNA Analyser 3730×l ABI
(Applied Biosystems).