A cDNA coding for human normal serum albumin A; an expression vector comprising the cDNA coding for human normal serum albumin A; a host transformed with the expression vector comprising the cDNA coding for human normal serum albumin A; and a process for the production of the human normal serum albumin A comprising the steps of culturing a host transformed with an expression vector comprising a cDNA coding for the human normal serum albumin to express the protein alone or in a form of a fused protein with another protein, and obtaining the human normal serum albumin A.
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