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首页> 外文期刊>journal of immunoassay >An Immunoligand Assay for Quantitation of Process SpecificEscherichia coliHost Cell Contaminant Proteins in a Recombinant Bovine Somatotropin
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An Immunoligand Assay for Quantitation of Process SpecificEscherichia coliHost Cell Contaminant Proteins in a Recombinant Bovine Somatotropin

机译：An Immunoligand Assay for Quantitation of Process SpecificEscherichia coliHost Cell Contaminant Proteins in a Recombinant Bovine Somatotropin

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摘要

We have developed a ThresholdTMSystem immunoligand assay for the quantitation of residual, process-specific,Escherichia colihost cell contaminant proteins (HCP) in somavubove (a normal sequence recombinant bovine somatotropin). The assay has a dynamic range of 2 to 160 ng/mL, with a limit of quantitation of 2 ng/mL. Daily analytical precision (CV) for six replicates of the designated somavubove laboratory standard is 3.0%. Cumulative analytical precision for multiple assay runs of this standard (a total of 69 laboratory standard replicates) is 8.4%. A conservative alert limit of 100 ng/mL has been assigned in order to assure analytical precision for each assay sample under conditions of stoichiometric antibody excess. Although the assay was designed for use as a profile-release specification assay, it has also been used to validate removal of HCP by the proprietary somavubove purification process. This use is consistent with regulatory guidelines related to “well characterized” recombinant biopharmaceutical proteins.

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