Modified amadoriase reacting with fructosyl hexapeptide
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United States of America Patent
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Sep 8, 2020
Grant Date -
Apr 30, 2015
app pub date -
Apr 26, 2013
filing date -
Apr 27, 2012
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Abstract
This invention provides an amadoriase having high reactivity with α-fructosyl hexapeptide (αF6P) derived from the β-chain amino terminus of glycated hemoglobin (HbAlc), which enables satisfactory quantification of αF6P cleaved from HbAlc. A novel amadoriase is derived from the amadoriase of the genus Coniochaeta by substitution of one or more amino acids at positions selected from the group consisting of positions 62, 63, 102, 106, 110, 113, 355, and 419. Such amadoriase enables rapid, simple, accurate, and satisfactory quantification of αF6P cleaved from HbAlc. With the use of such amadoriase, a method for measurement of HbAlc by an enzymatic method and a kit for measurement of HbAlc that are based on the same principle as used in the conventional standard method and excellent in terms of the relevance with the standard method.
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