3.4.22.25	expression of the pro-region of papaya proteinase IV in Escherichia coli	
3.4.22.25	expression of the proregion of the enzyme in Escherichia coli	
3.4.22.25	gene CpXCP7, genotyping using the peptidase_C1 domain, phylogenetic analysis and tree, quantitative real-time PCR enzyme expression analysis