Abstract
Thrombopoietin (TPO) acts synergistically with stem cell factor (SCF) in hematopoiesis and megakaryopoiesis. In this work, we designed the expression of SCF fused with the monomer or the dimer of TPO mimetic peptide through a flexible peptide linker. The recombinant fusion proteins were produced in E. coli DH5alpha at up to 25% of total cell proteins. The resultant inclusion bodies were refolded by dilution and purified by ion-exchange chromatography. Subsequent biological activity assays showed that the fusion proteins exhibited higher potency than recombinant human SCF, indicating that they have a potential role for pharmaceutical applications.
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