Interleukin (IL) 10 is synthesised and secreted mainly by type 2 innate lymphoid cells (ILC2) and T helper 2 cells (Th2) and regulates the growth, proliferation and differentiation of immune cells such as T cells, B cells, mono-cytes/macrophages and dendritic cells. It plays an important role in regulating immune response and maintaining immune homeostasis by synergizing with other cytokines. In this study, a plasmid pET-21d-CiIL-10 was constructed for expression of the recombinant protein in the Escherichia coli Rosetta (DE3) cells. After indu...