News & Press

Intermediate scale recombinant protein production

Between initial tests and larger scale up you may want to conduct intermediate scale recombinant protein production using baculovirus vectors.  If you are working with several constructs then this can begin to get expensive of cell culture vessels such as the ubiquitous 125ml conical flasks, in which you can amplify 25-30mls of virus-infected cells.  Space on shakers can also be at a premium in some labs. To address both the

Expression Systems insect cell culture media

OET is pleased to offer a wide range of Expression Systems Insect cell culture media, from the very popular ESF 921, to specialized insect transfection media. Expression Systems’ media are easy to adapt your cells into and the insect specific media gives great protein yield, when compared to rival media.   ESF921 insect culture media OET use ESF 921 for all in-house work, due to it’s high performance record, whilst

Adapting insect cells to a new growth medium?

Have you ever had the experience of adapting insect cells to a new growth medium?  We recently had to do this for a client project because they had used a particular medium previously and were keen to maintain the same conditions to continue the work with us. This process made us realise that switching to a new serum-free insect cell culture medium can result in short term stress responses in

baculoQUANT titration of recombinant baculoviruses

There are many methods available for the titration of recombinant baculoviruses.  One of the most convenient is the use of the quantitative polymerase chain reaction (QPCR), which assesses how much virus DNA is present in a freshly-amplified stock.  This is compared with a standard curve derived from a control virus stock to give an infectious titre expressed as Q plaque forming units (pfu) per millilitre.  OET Ltd market the baculoQUANT™

flashBAC 5+1 offer

OET’s flashBAC 5 reaction kit ranges are some of our most popular products. However, recent feedback has revealed that some customers are reluctant to make use of the positive control transfer vector as this sacrifices 1 reaction and so reduces the number of their own viruses that they can produce. In recognition of this issue, until further notice, we are increasing the amount of flashBAC DNA in all of our

Quick guide to plaque assays

Quick guide to plaque assays of baculovirus infectivity.  Last week we ran a short training course on baculovirus expression vectors.  As part of this we put together a one page guide for carrying out plaque assays.  This might be useful to those of you looking for something you can have on the lab bench while conducting your own plaque assays.  We have added a image of one of our 12-well

OET at ISBioTech Washington 6-8th March

OET founders, Linda King and Bob Possee will be attending ISBioTech in Washington, 6-8th March 2017.  Linda will be presenting a talk entitled, “BacMam Expression Vectors: Applications in Gene Therapy”.  The use of BacMAMs for recombinant gene expression in mammalian is an ever expanding application of baculovirus vectors.  Her talk will encompass some of her research group’s recent work on the potential use of BacMams to transduce whole organs and

Sf9 cells from monolayers to suspension cultures

Transferring Sf9 cells from monolayers to suspension cultures can sometimes be difficult.  These insect cells, commonly employed for baculovirus-mediated expression, are usually kept growing in suspension culture.  However, sometimes monolayer cultures are used to keep them going during periods of low demand.  These cultures are also useful as a reserve or back up for the main suspension cultures, which even in the best laboratories can sometimes become contaminated with unwanted

Transduction of whole porcine kidneys with BacMams

One of the unexpected offshoots of the baculovirus expression system has been its development as a vehicle for the delivery of genes to mammalian cells.  These vectors are otherwise known as BacMams.  Although baculoviruses are unable to replicate in mammalian cells, they can enter them via receptor-mediated endocytosis.  In Frederick Boyce’s original paper the Rous sarcoma virus promoter was used to express beta-galactosidase in the HepG2 human liver cell line. 

OET is now https://

We recently updated our web site to https:, which is apparently a jolly good thing!  (Although our CEO is still struggling to understand it all).  This shouldn’t cause any problems for users of the site, but if you have any issues such as problems logging into your account then please email us at info@oetltd.com and we will help you out.

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