The PCR conditions were as follows: 95 °C for 5 min; 32 cycles:
94 °C for 30 s, 56 °C for 30 s and 72 °C for 1 min; 72
°C for 7 min and 4 °C pause. The above amplification
products were purified and sent to Shanghai Sangon
Biotechnologies Co. Ltd. to sequence.