Objective To construct the prokaryotic expression vector GST-EM18,to optimize conditions for the expression of EM18-GST recombinant protein,and to predict the 3D structure of EM18using bioinformatics. Methods Using PMD18-T/Em18 as a template,CDS of EM18 was amplified to construct pGEX-3X-EM18.Different conditions were created for expression of EM18-GST recombinant protein.The 3D structure of EM18protein was determined via bioinformatics through a variety of online websites. Results The prokaryotic expressio...