title: WGBS of mmul lung
design: Firstly, the genomic DNA spiked with lambda DNA were fragmented to 200-400 bp. The DNA fragments were bisulfite treated to generate single strand DNA (ssDNA). During the bisulfite conversion, unmethylated cytosine were converted into uracil, while methylated cytosine staid unchanged. Methylation sequencing adapters were ligated, followed by double strand DNA synthesis. The library was ready after size selection and PCR amplification.