Stages in Downstream Processing: 5 StagesThis content was uploaded by our users and we assume good faith they have the permission to share this book. If you own the copyright to this book and it is wrongfully on our website, we offer a simple DMCA procedure to remove your content from our site. Start by pressing the button below! Food Microbiology Protocols, edited by J. Spencer and Alicia Leonor Ragout de Spencer, Williams and Anthony A. Clifford,
Downstream Processing of Proteins: Methods and Protocols (Methods in Biotechnology)
Scale-Up of Protein Purification: Downstream Processing Issues John Joseph Milne Abstract Large-scale chromatography operations continue to occupy a key position in the overall strategy for the downstream processing and purification of protein products for therapeutic use. Increasing product titres from mammalian cell culture has resulted in a trend to identify ways of improving the economics of product recovery and purification processes. In commercial manufacturing, a requirement exists to increase the scale of the chromatography operations, which are typically developed and optimised in small-scale experiments. This short review discusses the key factors in the chromatography process that need to be considered as the scale of the purification step is increased in order to maintain the purity and integrity of the product purified at smaller scale. Key words: Protein purification, Downstream processing, Chromatography, Scale-up. Introduction The market for biopharmaceutical products represents an increasingly significant proportion of total pharmaceutical annual sales resulting mainly from the considerable interest in monoclonal antibodies as therapeutic agents 1.
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This article throws light upon the five stages in downstream processing. The first step in product recovery is the separation of whole cells cell biomass and other insoluble ingredients from the culture broth Note: If the desired product is an intracellular metabolite, it must be released from the cells before subjecting to solid-liquid separation. Some authors use the term harvesting of microbial cells for the separation of cells from the culture medium. Several methods are in use for solid-liquid separation. These include flotation, flocculation, filtration and centrifugation. When a gas is introduced into the liquid broth, it forms bubbles.
By Glen R. Bolton, Bernard N. Violand, Richard S. Wright, Shujun Sun, Khurram M. Sunasara, Kathleen Watson, Johnathan L. Coffman, Christopher Gallo, and Ranga Godavarti.
Protocol DOI: The purification of a recombinant protein produced by animal cell culture, the so-called downstream process DSP , tends to be one of the most costly aspects of bioproduction. Chromatography is still the major tool on all levels of the DSP, from. Chromatography is still the major tool on all levels of the DSP, from the first capture to the final polishing step. In this chapter we will first outline the commonly used methods and their setup, in particular ion exchange chromatography IEX , hydrophobic interaction chromatography HIC , affinity chromatography AC , and gel filtration gel permeation chromatography [GPC], size exclusion chromatography [SEC] , but also some lesser known alternatives. Then the rational design of a downstream process, which usually comprises three orthogonal Chromatographic steps, is discussed. Antibody Data Search Beta.