There are a handful of drugs that combat specific viruses, such as the protease inhibitors used to control HIV infection, but these are relatively few in number and susceptible to viral resistance.
已有一些对抗特种病毒的药物，如用来控制HIV感染的蛋白酶抑制剂，但数量相对较少，而且易于产生病毒耐药性。
Hepatology Digest: The novel treatment options in development are focused on some inhibitors of HCV specific enzymes like NS3 protease and NS5B polymerase.
国际肝病： 有关治疗的新观点集中在一些丙肝特异酶抑制剂，例如NS3蛋白酶抑制剂、NS5B聚合酶抑制剂上。
The protease exhibits highly substrate-specific and can be easily induced by substrate.
而胞外蛋白酶具有高度的基质特异性，且极易受底物的诱导调控。
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