The HiP™ (High Purity) distinction by BPS Bioscience starts, of course (as the name says), with a high purity level. But that’s not enough. Such pure proteins may aggregate, which is not compatible with binding assays. Thus, the HiP™ label also demands a low level of aggregation, or even none at all. [Read more…]
On your journey to Biomarker profiling, you will reach the point where you need to quantify the proteins of interest identified along the way (eg. validation of semi-quantitative array results; biomarker discovery with an initial hunch on which pathway is involved).
At this stage, you will have narrowed down the number of targets you want to look at. However, the use of ELISAs is likely to be still too costly, too time consuming, and may require too much sample volume. [Read more…]
Progesterone derived Allopregnanolone (ALLO) is an extensively studied neurosteroid that has been shown to be involved in neurodegenerative diseases, including Alzheimer’s, Parkinson’s disease, and multiple sclerosis. It is also linked to neuroinflammatory processes through a beneficial action on pro-inflammatory cytokines.
Allopregnanolone detection kits based on polyclonal antibodies were already available through Arbor Assays (K044-H and K044-C), a specialist of immunassay kits, with a special focus on inflammation and reproduction targets.
A new Allopregnanolone EIA kit has just been released, based on a monoclonal antibody (K061-H1). In addition to the supply stability offered by the monoclonal antibodies, this new kit is more sensitive than the original one, it requires smaller sample volumes and provides increased signal. It also has a more favorable cross reactivity profile: [Read more…]
These cell lines transiently express the current FDA and EMA recommended SLC drug transporters (eg. OCT1 and OCT2; OAT1 and OAT3; MATE1; MAT2K…). Conditioned as cryopreserved format, they provide flexibility for experimental planning and can be assayed in just 2 days.
The JAK/STAT pathway is an important signalling process for numerous cytokines and growth factors.
Its activation is essential to many processes such as hematopoiesis, immune development, growth, adipogenesis, mammary gland development… [Read more…]
PD-1 / NFAT Reporter – Jurkat Cell Line
The PD-1 reporter cell line is a T cell line expressing luciferase under the control of NFAT response elements. The level of the luciferase activity measured with the One-Step luciferase detection system (BPS Bioscience) corresponds to the T cell activation in response to the TCR activator from the target cell.
To escape, the target cell may present PD-L1 or PD-L2 to PD-1. Indeed, the interaction inhibits the T cell activation. It leads to decrease in luciferase activity. [Read more…]
Human and Animal Dermal S9 Fractions now available as standard products
Subcellular fractions are widely used in drug discovery and preclinical drug development to evaluate the in vitro metabolism of new therapeutics. Skin fractions are already available from tebu-bio as catalogue items for CD1 Mouse and IGS Sprague Dawley Rat.
Protein biochemistry brings together a vast and varied world of methods of protein production, purification and characterization. Once you have successfully achieved the production of your protein in a selected system, you need to think about the following steps. Indeed, the quest does not stop there! The next step is purification, during which you will try to isolate your protein of interest from the surrounding contaminants while keeping it soluble and active. Your ultimate aim is to keep your protein “happy” by choosing the perfect buffer. You will be faced with a bewildering array of choices leading you to ask yourself “where do I start…?”.
Keep calm – it’s easy… [Read more…]
Reactive oxygen species (ROS) play key roles in various intracellular processes and have been shown to be involved in many diseases (eg. carcinogenesis, inflammation…). Each of the ROS species is likely to have a specific role in living cells. Therefore, there is an emerging need for selectively detecting each species of ROS through conventional biochemical assays, but also in live cell imaging (see a previous post “Reactive Oxygen Species (ROS) and related assay kits“).
Luciferase is the general term given to a class of oxidative enzymes that catalyze reactions that give off light, a process known as bio-luminescence (Fig. 1). In biology, researchers can take advantage of this reaction and use it as a readout for various biological processes. This has perhaps been exploited most in luciferase reporter cell lines where a promoter region from a gene of interest is placed immediately upstream of the coding sequence for luciferase. In this system, transcriptional activation of the gene of interest leads to a level of luciferase expression that is proportional to the level of gene activation.