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:
Oct. 17, 1995
Filed:
Mar. 31, 1994
Larry L McKay, St. Paul, MN (US);
Kayla M Polzin, Ames, IA (US);
Regents of the University of Minnesota, Minneapolis, MN (US);
Abstract
The present invention is directed to integration vectors including food-grade integration vectors, a method of increasing the stability of the inheritance of genes in microorganisms and transformed microorganisms containing an integrated vector and which exhibit an increase in the stability of inheritance of a gene. The integration vector is comprised of a first DNA sequence encoding a temperature sensitive plasmid maintenance and replication region, a second DNA sequence encoding at least one selectable marker gene, a third DNA sequence encoding an insertion sequence, and a fourth DNA sequence which encodes an unstable gene. The method of increasing the stability of the inheritance of a gene includes introducing the integration vector into a host microorganism, selecting transformed microorganisms, and confirming that selected microorganisms exhibit an increase in the stability of inheritance of a gene encoding a trait. Transformed microorganisms are provided which have at least one integration vector integrated into the genome and which exhibit an increase in the stability of the inheritance of a gene encoding a trait. The invention also provides DNA sequences substantially corresponding to a temperature sensitive plasmid maintenance and replication sequence, a nisin resistance gene, and a novel lactococcal insertion sequence.