strains producing greatly increased yield of PHB-deficient sphingan (diutan)
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United States of America Patent
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Jun 13, 2017
Grant Date -
May 12, 2016
app pub date -
Dec 18, 2015
filing date -
Jul 31, 2009
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Abstract
PHB-deficient Sphingomonas strains having improved sphingan yield are provided. Certain of the Sphingomonas strains are diutan-producing strains that exhibit a dramatic improvement in productivity and yield due to a combination of certain genetic modifications that affect PHB and sphingan synthesis. Moreover, the sphingans produced from such strains have superior characteristics including improved filterability, clarity, and improved rheology-modifying characteristics. The sphingans provided are, thus, highly desirable in a variety of commercial and industrial uses, including personal care items, cement applications, and oilfield applications.
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