Abstract
To purify the recombinant human serum albumin fusion protein with interleukin 1 (HAS/IL1ra) and to detect the bioactivity of the fusion protein. The recombinant HAS/IL1ra protein was purified by affinity chromatography and ion exchange chromatography, the bioactivity of the fusion protein was detected by IL1-induced A375 S2 cell killing. The purity of the fusion protein was at least 98 % as assessed by HPLC and the protective effect from the IL1-induced A375 S2 cell killing was similar to natural IL1ra. The purified recombinant HAS/IL1ra protein in this study has a satisfactory bioactivity.
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