PROBLEM TO BE SOLVED: To provide an enzyme having a soluble angiotensin-converting enzyme 2 activity without a carbohydrate chain, and further provide a gene that can be mass produced by prokaryotic microorganisms, an expression plasmid containing the gene and a transformant transformed with the expression plasmid.SOLUTION: The present invention provides an amino acid sequence of an enzyme having a soluble angiotensin-converting enzyme 2 activity without a carbohydrate chain derived from prokaryotic microorganisms, and a base sequence of gene thereof, an expression plasmid containing the gene and a transformant transformed with the expression plasmid.SELECTED DRAWING: None
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