ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,592, issued on March 25, was assigned to NANJING BESTZYME BIO-ENGINEERING Co. LTD. (Nanjing, China).
"Phytase mutant" was invented by Aixi Bai (Jiangsu, China) and Feng Li (Jiangsu, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a thermostable phytase, in which at least one pair of introduced disulfide bonds is included in the amino acid sequence of wild-type Escherichia coli phytase or mutant Escherichia coli phytase, and after the introduction, the properties of the phytase can be improved, especially the heat stability, steam stability and granulation stability, which are superior to those of the existing wild-type or mutant p...