Stabil genomisk integrering af multipie polynukleotidkopier

摘要

Methods of constructing a cell comprising in its chromosome one or more copies of an open reading frame (ORF) or operon encoding at least one polypeptide of interest, each copy being under the transcriptional control of a heterologous promoter using a site specific recombinase and in vivo integration by recombination; means for carrying out the methods, resulting cells, and methods for producing a polypeptide of interest using the resulting cells.