Enrichment method for variant proteins with altered binding prop

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving virus or bacteriophage

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435 681, 435 691, 435 697, 435 698, 4352351, 435239, 4353201, 436802, 530350, 5303871, 5303879, 536 241, C12Q 170, C12P 2106, C07K 1400, C07H 1700

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060401362

ABSTRACT:
A method for selecting novel proteins such as growth hormone and antibody fragment variants having altered binding properties for their respective receptor molecules is provided. The method comprises fusing a gene encoding a protein of interest to the carboxy terminal domain of the gene III coat protein of the filamentous phage M13. The gene fusion is mutated to form a library of structurally related fusion proteins that are expressed in low quantity on the surface of a phagemid particle. Biological selection and screening are employed to identify novel ligands useful as drug candidates. Disclosed are preferred phagemid expression vectors and selected human growth hormone variants.

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