Mascot search results show that the scores for P.Americana Cr PI allergen are 412(Protein scores greater than 73 are significant),Conclusions: The cockroach major allergen Cr PI was overexpressed in E.

• 将质谱分析获得的肽片段质量数据用Mascot软件在NCBI数据库中搜寻，结果显示美洲大蠊主要变应原Cr PI的score值为412（score值大于73就有意义P<0.；05），这也进一步证实表达产物的正确性。