小中大他们发的文章看了气死个人.Biological activity of refolded rduIL-2 was assessed by
in vitro lymphocyte proliferation assay. The in vitro proliferation of duck SMC was significantly stimulated with 1.6 ng refolded rduIL-2 monomer/well, and was a dose-dependentmanner (Fig. 3). It is easy to quantitate the precise amount of rduIL-2 present in our refolded preparation, because of its simple monomer form. However, no standard
for duck IL-2 is currently available, making evaluations of biologic activity relative only to samples evaluated within the same assay. In addition, the bioactivity can not be measured as U/mg form in our primary splenocytes, because of no avian IL-2-specified cell lines in vitro. Respecting the high purity and refolded monomer form, our refolded rduIL-2 might possess a higher bioactivity unit (>8.6X100000/mg ) than described before .他说没标准细胞系,不好标定.然后就说他的活性一定大于8.6X100000/mg .我想用50%最大反应浓度 EC50,定义为1AU(AU为活性单位).在做MTT做.没有标准细胞系,我就用原代细胞了.但MTT的最大反应浓度有办法做没有?原代细胞有啥影响呢