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通过有机试剂抽提，ＣＦ－１１纤维素柱层析，从感染水稻齿叶矮缩病毒菲律宾分离株（ＲｉｃｅＲａｇｇｅｄＳｔｕｎｔＶｉｒｕｓ，Ｐｈｉｌｉｐｐｉｎｅｉｓｏｌａｔｅ，简称ＲＲＳＶ－Ｐ）的水稻植株中获取该病毒的全基因组，即获得从Ｓｅｇｍｅｎｔ１到Ｓｅｇｍｅｎｔ１０（Ｓ１－Ｓ１０）的１０条双链ＲＮＡ（ｄｓＲＮＡ），然后设计合适的引物，用ＲＴ－ＰＣＲ方法得到Ｓ９的ｃＤＮＡ并将其克隆到ｐＵＣ１１９质粒上扩增，以双链测序法测定该ｃＤＮＡ的全序列。同时又将此ｃＤＮＡ克隆到大肠杆菌表达质粒ｐＧＥＸ－３Ｘ上，在大肠杆菌菌株ＤＥ３中用ＩＰＴＧ诱导表达，经超声波破菌、离心、Ｇｌｕｔａｔｈｉｏｎｅ－ｓｅｐｈａｒｏｓｅ４Ｂ亲和层析，得到纯化的分子量为６４ｋＤ的融合蛋白。
The whole genome of the virus was obtained from rice plants infected with Rice Ragged Rats virus (Philippine isolate, RRSV-P) by organic reagent extraction and CF-11 cellulose column chromatography, (DsRNA) from Segment1 to Segment10 (S1-S10). Then, a suitable primer was designed. The cDNA of S9 was obtained by RT-PCR and cloned into pUC119 plasmid for amplification. The double-stranded sequencing The full sequence of this cDNA. At the same time, the cDNA was cloned into E. coli expression plasmid pGEX-3X and induced by IPTG in E. coli strain DE3. The recombinant plasmid was sonicated and centrifuged, and Glutathione-sepharose 4B affinity chromatography was performed to obtain a purified fusion protein with a molecular weight of 64 kD protein.