Posts Tagged ‘Protein’
Last Updated on Wednesday, 7 July 2010 02:04 Written by Administrator Wednesday, 7 July 2010 02:04

Allele Biotech, now including Orbigen, provides services at all stages of the protein expression, production, and purification processes from gene cloning to large-scale fermentation. More than a decade ago, our technical staff offered the first commercial Baculovirus protein expression services to address researchers´ unmet gene expression needs. Today we are on the cutting edge of a variety of expression and antibody production technologies so that you can accelerate your research by taking advantage of our comprehensive range of services. In terms of protein expression, bacteria and yeast are commonly used to express a variety of proteins because they are more convenient and less costly than other systems. However, they may not be suitable for producing mammalian proteins with important post-translation modifications (PTM). Insect cells can be used effectively for producing large quantities of mammalian proteins rather easily through baculovirus such as Allele´s Sapphire system. PTM in insect cells is not exactly the same as in mammalian cells, eg different glycosylation patterns. Mammalian cells are used for proteins that require appropriate PTM or are not soluble in other systems through either transient transfection or stable cell line establishment. Allele Biotech is developing its own system to use baculovirus for expression in mammalian cells that will avoid high costs associated with large scale transient transfection, or the time consuming stable cell line …
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Tags: Expression, Protein | Posted under Transfection Videos | 1 Comment
Last Updated on Wednesday, 16 June 2010 11:01 Written by Administrator Wednesday, 16 June 2010 11:01
Our vision at Aldevron is to be a world-class global contract services organization. To achieve this, we need to understand what our clients need and deliver what they want. One of our services is expression screening in insect cells. We offer a range of options to suite the clients needs. A typical screening project includes multiple variants, such as amino acid changes or truncations, of a single gene. We are able to screen multiple variants and culture conditions in parallel. There are a couple of options for expression screening in insect cells. The first option is to screen for expression via baculovirus infection. We can either start with a recombinant transfer vector supplied by the client or we can clone the gene of interest into a baculovirus transfer vector. Next, we generate a high-titer baculovirus stock and determine the viral titer. We then infect 10ml Sf21 cultures for recombinant protein expression. The second option is to screen for expression via direct transfection. This allows us to go from plasmid to protein in as little as 48 hours. We start by cloning the gene of interest into an expression vector designed to enable robust expression in insect cells without the need to produce recombinant baculovirus. Next we transfect 10ml Sf9 cultures with the recombinant plasmids. 48-72 hours post-transfection, we harvest the cells. Because generating a recombinant baculovirus can require anywhere between 2-4 weeks of time, the direct transfection method offers a …
Tags: Aldevron, cells, Expression, Insect, Protein | Posted under Transfection Videos | No Comments