Prokaryotic Expression and Polyclonal Antibodies Purification of Protein Phosphatase TOPP4 in Arabidopsis Prokaryotic Expression of Cucumber CsERECTA Gene and Preparation of Its Polyclonal Antibody Prokaryotic expression of V 2 gene of Tomato yellow leaf curl virus and preparation of its polyclonal antibody Prokaryotic Expression and Polyclonal Antibody Preparation of Cucumber CsHIR1 Gene Expression,Purification and Immunoreactivity of Hygromycin-B-Phosphotransferase