The purity and quality of DNA obtained by this method is satisfying. The ratio of OD260 to OD280 is over 1.7. These genomic DNA are then amplified by PCR with two oligoneclotide primers synthesised to obtain partial nucleotide sequences of trypsin gene.

• 首先采用修改过的基因组DNA提取方法提取其基因组DNA，获得的基因组DNA纯度高，质量好，OD260/OD280比值均大于1.；7。