The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 1976
Filed:
Dec. 20, 1974
Walter Brent Aitken, Newark, DE (US);
Ronald Wayne Bussian, Newark, DE (US);
Robert Carroll Menson, Wilmington, DE (US);
Venkatachalam Narayanswamy, Wilmington, DE (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Phosphoenol pyruvate carboxylase is stabilized to have a shelf life of six months or more by incorporating the phosphoenal pyruvate carboxylase in an aqueous solution containing from 0.002 to 0.05 molar sodium phosphate, from 1 to 10, and preferably 3 to 8, m molar aspartate, from 0.02 to 0.1 m molar ethylene diamine tetraacetic acid, from 0.6 to 3.15, and preferably 0.8 to 1.2, molar ammonium sulfate and up to 20 volume percent glycerol. The sodium phosphate acts as a buffer to maintain the pH of the solution at from 6.0 to 6.8.