Promega Fc Effector Assays: Measure Every Mechanism

This post is written by Kai Hillman, PhD, Promega Corporation.

Every day, scientists push the boundaries of what’s possible with monoclonal antibodies (mAbs)—from targeting cancer cells to calming autoimmune-driven inflammation. These therapies rely not only on binding but on engineering the desired immune response. The suite of Promega Fc Effector Assays helps you understand these interactions from receptor binding and function, through bridging studies. With consistency, sensitivity, and scalability, these assays support teams from early discovery through lot release.

This article draws on real-world publications and product insights to show how Promega assays are powering next-generation immunotherapies—and redefining how we measure immune engagement.

Schematic diagramming the suite of Promega Fc effector assays in one seamless workflow to support antibody development across the pipeline.
Figure 1. Promega delivers the most comprehensive suite of Fc effector assays in one seamless workflow to support antibody development across the pipeline.
Continue reading “Promega Fc Effector Assays: Measure Every Mechanism”

Residence Time: The Impact of Binding Kinetics on Compound-Target Interactions

This blog was written by guest contributor Tian Yang, Associate Product Manager, Promega, in collaboration with Kristin Huwiler, Manager, Small Molecule Drug Discovery, Promega.

During the development of chemical probes or small-molecule drugs, compound affinity (Kd) or potency (IC50) is used to characterize compound-target interactions, to guide structure-activity relationship analysis and lead optimization and to assess compound selectivity.

However, neither parameter provides information on how quickly a compound engages with and dissociates from the target. The dissociation constant Kd reflects the relative concentrations of unbound and bound state of the compound at thermodynamic equilibrium, and while IC50 is an empirical metric that measures the concentration at which a biochemical or cellular process is reduced to half of the maximum value, IC50 values are typically determined when the process is assumed to be at equilibrium or steady-state. For a closed system, like cells in a culture dish, these thermodynamic parameters are quite informative. In an open system like the human body, where compound-target interactions often do not reach equilibrium, the kinetic parameters, in addition to the thermodynamic parameters, are needed to better understand and characterize compound target engagement over time (1,2).

Continue reading “Residence Time: The Impact of Binding Kinetics on Compound-Target Interactions”

CRISPR/Cas9 Knock-In Tagging: Simplifying the Study of Endogenous Biology

Understanding the expression, function and dynamics of proteins in their native environment is a fundamental goal that’s common to diverse aspects of molecular and cell biology. To study a protein, it must first be labeled—either directly or indirectly—with a “tag” that allows specific and sensitive detection.

Using a labeled antibody to the protein of interest is a common method to study native proteins. However, antibody-based assays, such as ELISAs and Western blots, are not suitable for use in live cells. These techniques are also limited by throughput and sensitivity. Further, suitable antibodies may not be available for the target protein of interest.

Continue reading “CRISPR/Cas9 Knock-In Tagging: Simplifying the Study of Endogenous Biology”

From Content Creators to Communication Partners: The Role of Motion in Scientific Storytelling

Image generated by DALL-E.

Moving Science Forward — Literally

I’ve always believed that the best science stories don’t just inform — they move us. And in many cases, that’s quite literal.

Whether I’m designing a figure for a new assay or animating a step-by-step protocol, I see motion as a bridge that turns complexity into clarity. When used well, that bridge transforms scientific communication from dense and static into something dynamic, visual and memorable.

And it’s not just me — a graphic designer — saying this. Scholars like Daniel Liddle describe motion as a form of visual rhetoric: a way to persuade, clarify and build trust through movement. Motion isn’t just decoration — it’s meaning made visible.

In this post, I’ll explore why motion matters in scientific communication and how animation makes complex ideas easier to grasp. From turning a protocol into a story that sticks to making technical jargon something you can remember, motion design helps science feel more approachable and a lot more memorable.

Continue reading “From Content Creators to Communication Partners: The Role of Motion in Scientific Storytelling”

How Calcium Shapes Cell Communication and Invasion

Platelets are best known for their role in blood clotting, but they also participate in other biological processes that influence how cells communicate and behave. In research models, scientists have observed that tumor cells can interact with platelets in ways that affect how they move and attach to new environments. A recent study by Morris et al., published in Scientific Reports, explored the molecular details behind these platelet–cell interactions and the role of calcium in regulating them.

The Role of Integrins and Calcium

The study focused on integrins, which are surface proteins that help cells anchor to their surroundings and communicate with the extracellular matrix. Two integrins, αIIbβ3 and αvβ3, are particularly important because they mediate platelet–platelet and platelet–cancer cell binding. Their structure and function depend on divalent cations such as calcium, which stabilize receptor conformation and support ligand binding.

When extracellular calcium levels were manipulated, platelet behavior changed in distinct ways.

Continue reading “How Calcium Shapes Cell Communication and Invasion”

Therapeutics Come Alive: An Interview with PharmaBiome

The next generation of medicine may not come in a pill or vial — but in a living community of microbes. Scientists at Pharmabiome, a Zurich-based biotechnology company, are leveraging their expertise in microbiome research to create truly “living” therapies.

More Than a Gut Feeling

All around us – and inside –exists an entire universe of microscopic organisms commonly referred to as the microbiome. In fact, our body contains more microbes than human cells, working hand in hand to maintain normal physiology. The most heavily colonized part of our body is our gastrointestinal (GI) tract – our gut – housing thousands of different bacteria, viruses and fungi. Collectively termed ‘gut microbiota’, this complex network of microorganisms helps us digest nutrients, produces essential metabolites, protects us against pathogens, and more.

The diverse species in our GI tract co-exist in a dynamic equilibrium, each fulfilling a defined set of functions and interacting with other species through cross-feeding mechanisms that, together, promote gut health. When this delicate balance is perturbed, be it through dietary changes, antibiotic treatments, or other factors, the effect ripples across the body. Increasing evidence suggests that gut dysbiosis actively contributes to pathological conditions ranging from inflammatory bowel disease (IBD) and obesity to neurological and autoimmune disorders. The good news is, as our understanding of gut ecology evolves, so does the potential to harness and reshape the microbiome to improve health.

Continue reading “Therapeutics Come Alive: An Interview with PharmaBiome”

Targeted Protein Degradation: How Chemoproteomics and Induced Proximity Are Shaping Drug Discovery

Earlier this fall, more than 90 researchers from academia and industry gathered at the Promega Madison campus for the 4th TPD & Induced Proximity Symposium. The event focused on the rapidly advancing field of targeted protein degradation (TPD) and the broader concept of induced proximity—therapeutic strategies that bring two or more proteins into proximity to trigger a specific biological effect. 

This 4th year reflected of the symposium a maturing and diversifying field with chemoproteomics and proteomescale mapping redefining what it means to be “druggable,” while AI and high throughput biology are connecting molecular design to cellular function. Yet the mission remains unchanged—using molecular approaches that leverage the cellular machinery to make progress against targets once deemed “undruggable.” 

Continue reading “Targeted Protein Degradation: How Chemoproteomics and Induced Proximity Are Shaping Drug Discovery”

Bringing Industry-Relevant Lab Experience to Undergraduate Life Sciences Majors with MyGlo®

When Dr. Rebecca Miles retired from her 25-year career in pharmaceutical research at Eli Lilly, she refocused her passion for science on a new challenge. Having worked her way from the bench to Senior Director, she knew first-hand the technical skills required to successfully advance genetic medicine programs. Now, she leverages her industry experience and the latest technologies at Taylor University, a liberal arts institution in Indiana known for its strong emphasis on education and practical training for students’ future careers. As a Visiting Assistant Professor of Biology, Dr. Miles trains her students to develop real-world skills and provides them exposure to technologies that impacted her own career. “I wanted to redesign the lab so that students could come out of the semester with some job skills if they wanted to be a technician in a lab,” she explains.

Dr. Rebecca Miles undergraduate class with their MyGlo®

Teaching Students Modern Technologies

Dr. Miles structures her lab courses to incorporate techniques that scientists would routinely use in an industry setting. Students learn cell culture, plating, luminescent assays, and data analysis in ways that mirror the workflows used in biotech and pharmaceutical labs. She encourages her students to analyze their raw data to learn how the calculations work. “I want the students to calculate it in Excel and do it themselves and see the standard deviation,” she says.

Continue reading “Bringing Industry-Relevant Lab Experience to Undergraduate Life Sciences Majors with MyGlo®”

Bones and Blood: Uncovering History Through DNA

Halloween invites us to look beneath the surface—to find the stories hidden in bones, blood, and the echoes of the past. Science, too, has its own way of conjuring the long dead, not through spells but through DNA analysis. The three Promega Connections blogs highlighted below revisit centuries-old mysteries, using modern genetics to reveal the truths hidden where legend once ruled.

The Bones of a King: Richard III

Under a modern car park in Leicester, England, archaeologists uncovered bones twisted by scoliosis and scarred by battle. Could these truly belong to the infamous Richard III? DNA evidence answered with haunting precision in “King Richard III Identified.”

Mitochondrial DNA matched that of a living descendant of Richard’s sister, confirming the king’s identity more than 500 years after his death. Beyond solving a royal mystery, genetic analysis gave historians a clearer picture of the much-maligned monarch—his appearance, stature, and final violent moments. The same technology that identified Richard III may one day reveal the fate of his murdered nephews, the “Princes in the Tower.” Even as bones turn to dust, DNA keeps their stories alive.

Continue reading “Bones and Blood: Uncovering History Through DNA”

Insights from 3D Liver Models: Rethinking Fatty Liver Disease with Hormone Correction

Liver disease is a global health challenge, affecting millions each year. The liver has a remarkable ability to regenerate; however, chronic damage arising from obesity, alcohol, or metabolic dysfunction can lead to irreversible failure. At the University of Edinburgh’s Centre for Regenerative Medicine, Professor David Hay’s lab is developing innovative ways to study liver function and disease using a lab-grown mini-organ. In this blog, we highlight how Dr. Hay’s lab is redefining liver disease research through 3D models that reveal how hormones influence metabolic health.

Continue reading “Insights from 3D Liver Models: Rethinking Fatty Liver Disease with Hormone Correction”