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酵母双杂合系统是在酵母细胞中研究蛋白－ 蛋白相互作用的新技术。应用该技术，以丙型肝炎病毒（ＨＣＶ） 非结构蛋白５Ａ（ＮＳ５Ａ） 为“诱饵”，筛检了人肝癌细胞ＨｅｐＧ２ 来源的ｃＤＮＡ文库，获得了７ 个ＮＳ５Ａ 结合蛋白的基因克隆。报道了其中两个阳性克隆（ ＃ ２ 、＃ １６） 的结果，并对“人核小体组装蛋白相关蛋白”（Ｈｕｍａｎ ｎｕｃｌｅｏｓｏｍｅａｓｓｅｍｂｌｙ ｐｒｏｔｅｉｎ －ｒｅｌａｔｅｄ ｐｒｏｔｅｉｎ ，ｈＮＲＰ） 和“载脂蛋白Ａ－Ｉ”（Ａｐｏｌｉｐｏｐｒｏｔｅｉｎ Ａ－ Ｉ） 与ＮＳ５Ａ结合的生物学意义进行了讨论。
The yeast two-hybrid system is a new technique for studying protein-protein interactions in yeast cells. Using this technique, a HepG2-derived cDNA library of human hepatocellular carcinoma cells was screened with the hepatitis C virus (NS5A) non-structural protein 5A (“NS5A”) as bait, and seven NS5A binding protein gene clones were obtained. The results of two positive clones (# 2, # 16) were reported and the effects of “Human nucleosome assembly protein-related protein (hNRP)” and "Apolipoprotein The biological significance of binding to NS5A is discussed.