Mutant human prourokinase
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United States of America Patent
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Feb 14, 1995
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N/A
app pub date -
Oct 6, 1992
filing date -
Oct 7, 1991
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Abstract
A mutant human prourokinase wherein a neutral amino acid in the epidermal growth factor (EGF) region of human prourokinase (human PUK) has been replaced with a basic amino acid, or an acidic amino acid has been replaced with a non-acidic amino acid, and a method for producing a mutant human PUK which comprises expression of mutant human PUK by cultivating a host transformed by a plasmid inserted with a DNA sequence coding for said mutant human PUK. By replacing a neutral amino acid in the EGF region of human PUK which is a fibrinolysin with a basic amino acid, or an acidic amino acid with a non-acidic amino acid, half-life in blood can be prolonged, and affinity for fibrin can be improved.
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