Phenylalanine dehydrogenase production
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United States of America Patent
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Feb 3, 1998
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N/A
app pub date -
Mar 20, 1996
filing date -
Oct 21, 1993
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Abstract
A method for producing in culture phenylalanine dehydrogenase at yields of 50+ units of enzyme per litre of culture, one unit measured as the amount required to convert one micro-mole of phenylalanine to phenyl pyrovic acid at 25.degree. C. and pH 10.8, in a growth medium comprising a nitrogen source, a buffer, phenylalanine or phenylpyruvic acid or a salt thereof at 20 mM and optionally a vitamin solution. Using phenylalanine at about 100 mM gives yields of phenylalanine dehydrogenase enzyme of 350+ units per liter of culture.
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