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:
Aug. 15, 1989
Filed:
Jul. 23, 1986
Kotikanyadan Sreekrishna, Bartlesville, OK (US);
Motohiro Fuke, Bartlesville, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
Yeast strains are transformed with, and selected for, using DNA fragments encoding a gene function not present in the wild-type yeast strains. The invention requires transforming the yeast with DNA fragments which comprise the gene function which the wild-type yeast strain is lacking; regeneration of the transformants on a non-selective regeneration medium; then selection of those colonies which are capable of growth on a carbon and energy source which requires expression of the gene function provided by the DNA fragment. Thus, transformation with such DNA fragments allows for positive selection of transformed strains.