Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Johnson Chung0
Graham S. Byng0
Date of Patent
March 20, 2007
0Patent Application Number
108981690
Date Filed
July 26, 2004
0Patent Primary Examiner
Patent abstract
A microorganism that is a mutant bacterial strain of the species Actinosynnema pretiosum, designated PF4-4, (ATCC PTA-3921), being capable of producing maytansinoid ansamitocins such as ansamitocin P-3 in improved yield compared to previous known strains, and capable of growth under varied culture conditions, and methods of producing maytansinoid ansamitocins by culturing PF4-4 in a suitable growth medium.
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