Posts

A biomolecule protein purification workflow requires more than one resin. The trick is to find the combination of resins that provides the highest purity in the least number of steps and at the lowest cost. Here are some guides to select the optimal resins for the purification of monoclonal antibodies, native and recombinant proteins, Ig G and mammalian and adenovirus, and for removing aggregates and endotoxins.

In this second part of the series on assessing the health of your cells, we review the different types and stages of apoptosis, and the various methods of assessing apoptosis of cells.

Macrophages are important players in the phagocytosis process in the immune system. In this detailed review, we provide an overview on the different types of macrophages, the signaling molecules involved in the polarization of M1 and M2 macrophage subsets, and more.

Producing highly purified proteins in large quantities is a challenge and requires modification of methods and protocols to attain high efficiency. Dr Murat Kasap from Kocaeli University, Turkey, has overcome these difficulties by taking advantage of the modularity of the NGC Chromatography System and successfully synthesized and purified cardiac troponin-I protein.

This video explains how to remove bubbles and/or reduce bubble formation in your NGC System. Tips to reduce bubbles include warming up your multiwave detector for 30 to 60 min before use and flowing buffer at 0.1–0.2 ml/min in the manual mode until a stable/flat baseline is achieved before starting a method. The system may also be flushed with 100% methanol or ethanol at purge speed, with columns out of line, to remove bubbles.

This video describes the functions of the Air Sensor Module and how to connect it to the NGC Chromatography System. The NGC Air Sensor senses the end of sample or buffer and prevents the introduction of air into the system, which can damage columns and/or incur the loss of precious samples. Both small and large air sensors are available to fit the tubing being used. Steps for connecting the Air Sensor Module and associated air sensors are described including how to add the air sensors into the system flow path using ChromLab™ Software and the differences in using the air sensors in manual vs. method modes.

It is imperative to analyze both the transcriptional and translational profiles for a complete understanding of the functioning of genes. Here we describe a simple protocol that enables parallel analysis of both RNA and protein from single cell culture lysates. See how this workflow could save time and money and yield more reliable data than the traditional protocols used.

In this multi-part series on assessing the health of your cells, we review different factors to be considered in your assessments such as cell viability, proliferation, apoptosis, and autophagy. The first part covers the methods for assessing viability and proliferation and their advantages, and discusses some common considerations.

Protein purification becomes a challenging step for applications requiring high protein concentrations (such as structural biology studies). This is also true for researchers purifying integral membranes proteins and untagged proteins from native sources. Here we provide some useful tips for selecting the proper resins, optimizing conditions and developing effective strategies to tackle the challenges associated with such difficult-to-purify proteins.

Picking the right gel for your application is not easy. It depends on so many factors, such as the purpose of your application, the size of your protein, what kind of buffer you need to have in your sample etc. Here we provide a guide for you to choose the best Bio-Rad gel based on all these factors.