Polypeptide purification method

摘要

This invention relates to a purification method, particularly for purifying tyrosine kinase receptor related polypeptides, and to products made by the method. The method comprises a method of producing tyrosine kinase receptor-related polypeptides, the method comprising expressing a tyrosine kinase receptor-related polypeptide in a recombinant expression system and separating expressed monomeric tyrosine kinase receptor-related polypeptide from multimeric form(s) of the expressed polypeptide in a separation step, the separation step allowing refolding of the expressed tyrosine kinase receptor-related polypeptide into a biologically active form.