The yield reached 10 - 12mg / l . dr . chen ding hu in plant virus group of institute of plant protection of the caas ( chinese academy of agriculture sciences ) selected pap muts recombinants and wanted to produce pap through fermentation to prevention and cure plant virus disease 中国农科院植保所植物病毒实验室陈定虎博士成功的筛选到p . pastorispap利用甲醇缓慢型重组子( mut ~ s ) ，希望能利用微生物发酵的方法来大量生产pap ，将其应用于植物病毒病的防治。
