Tag: <span>contract research</span>

Transient HEK293 Recombinant Protein Production Flow: The Replenishment of Protein Batches By Outsourcing to a Contract Research Organization

In order to unravel new protein activities and functions, we have expressed and purified a large number of human proteins. We have chosen to study secreted proteins and the extra-cellular domains of putative single transmembrane domain-containing proteins. In order to retain the natural protein characteristics as far as possible, we have used a mammalian expression system. Human embryonic kidney (HEK293) cells were chosen as they have been shown to possess a high protein-secretory potential. The secreted proteins were expressed with a carboxy-terminal tag and purified by affinity chromatography. Each protein was produced at a routine scale from 500 ml cell cultures, and the secreted protein was purified from the culture supernatant…

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Biologics Production Research

contract research outsourcing protein expression protein production pipeline purification recombinant proteins

Nucleic Acid Analysis of Viral Vectors: A Contract Research Organization’s Perspective

Currently, the U.S. Food and Drug Administration (FDA) recommends DNA sequencing for the structural characterization of gene transfer viral vectors in investigational New Drug Applications (INDs). While FDA provides guidelines on what should be sequenced in regard to these vectors, it provides little insight — beyond GLP/GMP (GxP) guidelines — into how the finalized sequence data should be obtained. There is presently no provision for determining which sequencing methodology (or methodologies) is most appropriate for obtaining a completed sequence characterization for each of the different vector classes, and there is no standard that outlines what DNA sequencing-specific criteria the data and data collection processes should meet in order to guarantee that the sequence is 99.99% accurate…

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Nucleic Acids Research Uncategorized Viral Vectors

characterization contract research DNA quality sequencing shotgun sequencing standards