The aim of the study was to create a prokaryotic expression system for the CA125 tandem repeat protein (CA125R), purify the protein, and develop an antiserum against it.
Researchers synthesized the CA125 gene, cloned it into a vector, transformed it into E.coli, optimized expression conditions, and used chromatography and Western blotting to purify and confirm the protein.
The study successfully produced a high-purity CA125R protein and generated specific antiserum that recognizes both the recombinant and natural forms of the CA125 glycoprotein.