Four pairs of degenerate primers (dpE, dpF, dpG, and dpH) were designed according to the conserved amino acid sequences of insect CYP6 genes, and another pair of degenerate primers (dpA) reported by
Kasai et al. (1998) (
link)
were taken for comparison (
Table 1). The amplification was performed with
S1000 PCR Thermal Cycler (Bio-Rad,
www.bio-rad.com) using 2X ES Master mix Taq polymerase (CWBIO,
www.cwbiotech.com). The total reaction volume was 25 µL, including 1 µL cDNA, 1 uL 10 µM/L forward and reverse primer respectively, 12.5 µL 2X ES Master mix Taq polymerase, and 9.5 µL ddH2O. The PCR program was conducted under the following conditions: an initial denaturation at 94°C for 1 min followed by 30 cycles of 94°C for 30 sec, 45°C for 30 sec, and 72°C for 1 min, and a final extension at 72°C for 10 min. The PCR products were then separated by 1.5% agarose gel electrophoresis and stained with ethidium bromide (EB). The bands of the expected size (250 bp, 270 bp, and 420 bp) were excised and recovered using Universial DNA Purification Kit (Tiangen Biotech).
Wang H.D., Li F.F., He C., Cui J., Song W, & Li M.L. (2014). Molecular cloning and sequence analysis of novel cytochrome P450 cDNA fragments from Dastarcus helophoroides. Journal of Insect Science, 14, 28.