Method for the construction of randomized gene sequence...

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving nucleic acid

Reexamination Certificate

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C435S007100, C435S069100, C435S254200, C435S320100

Reexamination Certificate

active

07833703

ABSTRACT:
An in vivo method for the construction of randomized gene libraries and/or domain replacement in gene libraries by homologous recombination using aKluyveromyces lactiskiller toxin, in particular the (γ-subunit of theK. lactiskiller toxin, as negative selection marker is described. The use of the (γ-subunit ofK. lactisas negative selectable marker increases the percentage of randomized clones.

REFERENCES:
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patent: 2002/0160380 (2002-01-01), Truan et al.
patent: WO 02/00729 (2002-01-01), None
Butler et al. Intracellular expression ofKluyveromyces lactistoxin gamma subunit mimics treatment with exogenous toxin and distinguishes two classes of toxin-resistant mutant. Yeast 7: 617-625, 1991.
Sherman. Getting Started with Yeast. Methods Enzymol. 350:2-41, 2002.
Monschau et al. Threonine aldolase overexpression plus threonine supplementation enhanced riboflavin production inAshbya gossypii. Applied and Envtl. Microbiol. 64(11): 4283-90, 1998.
Jirholt et al. Exploiting sequence space: shuffling in vivo formed complementarity determining regions into a master framework.Gene 215: 471-476, 1998.
Meinhardt et al., “A Novel Approach to Express a Heterlogous Gene onKluyveromyces lactisLinear Killer Plasmids: Expression of the BacterialaphGene from a Cytoplasmic Promoter Fragment without In-Phase Fusion to the Plasmid Open Reading Frame,”Plasmid32, 318-327 (1994).
International Search Report dated Aug. 5, 2003 for corresponding PCT application No. PCT/IB03/01452.
International Preliminary Examination Report dated Aug. 6, 2005 for corresponding PCT application No. PCT/IB03/01452.

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