Western blotting: Quantify with confidence

Support and solutions for clear, quantitative protein detection to accelerate drug research and discovery

Learn how to get more from your Western blots

In research, you know reliable protein analysis is key to identifying molecular targets, quantifying expression, and uncovering tomorrow’s big breakthroughs.

Along with a complete workflow, we offer Western blotting training, education, and troubleshooting tools to help you avoid common pitfalls, minimize variability, and deliver data you can trust.

Explore our Western blotting guide

Reproducible results with every blot

The first time and every time, get consistent Western blot performance with a standardized, scalable workflow.

Reagents: enhanced chemiluminescence (ECL) and standards for sensitive, low‑background detection delivering a clear, lasting signal
Membranes: nitrocellulose (NC) and polyvinylidene fluoride (PVDF) options offering high protein binding capacity and retention
Imaging systems: quantitative, low-background imaging optimized for high signal-to-noise ratios
Software: chromatogram visualization to annotate and compare bands to peaks, with an image integrity checker enabling faster publication

Built on decades of Western blotting expertise

From pioneering ECL detection to supporting today's best practices in protein analysis, we help researchers achieve reliable, reproducible results.

Selection guide

Sensitive detection for low-abundance proteins

Our ECL reagents support diverse applications, offering sensitive detection across a wide dynamic range so you can accurately measure low-abundance proteins and compare expression across samples.

Teach me in 10

Accurate and robust protein quantitation

Total protein normalization is becoming the preferred method for protein quantitation, offering a broad detection range with reduced susceptibility to biological variation. Learn more in our quick explainer video.

7 steps to Western blot workflow optimization

Step 1 Sample preparation and protein extraction

Enhance protein stability, reduce background noise, and improve resolution through careful sample preparation.

Step 2: SDS-PAGE protein separation

Select the appropriate gel percentage and use a stacking gel to achieve tight, well-resolved protein bands during electrophoresis.

Step 3: Protein transfer to membrane

Choose between wet or semi-dry transfer methods and between PVDF or nitrocellulose membranes, but keep in mind that other factors like buffer composition and electric field strength also influence blotting success.

Step 4: Membrane blocking

Block to prevent nonspecific binding of primary and secondary antibodies.

Step 5: Primary antibody incubation

Optimize the concentration and incubation time for the primary antibody.

Step 6: Secondary antibody incubation

Select a secondary antibody conjugated to either a chemiluminescent or fluorescent detection molecule. Stripping and reprobing your membrane enables reuse of the blot to detect additional proteins.

Step 7: Detection and analysis

Western blotting imaging options include x-ray film, CCD cameras, or laser scanners, depending on the detection method used.

Explore a complete 7-step guide to Western blotting

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Trust in Western blot data starts with image integrity

You need to know that your raw image data is authentic and intact.

Our imaging systems, analysis software, and image integrity checker software help you verify image authenticity, confirm which files are original, and support paper submission with a report you can attach.

Alongside the software, we provide educational resources that help you strengthen image handling practices and support scientific integrity.

Try the free Image Integrity Checker

Build your Western blotting knowledge

A deep dive into Western blotting

Download this comprehensive Western blotting handbook packed with information, protocols, tips, and tricks.

Optimize your blots

Innovation in accurate imaging

Dive into imaging solutions, their advantages and limitations, and how to choose the right one for your lab.

Advance your imaging

2D electrophoresis handbook

Review 2D electrophoresis methods for analyzing complex protein mixtures, with tips and tricks for effective sample prep.

Master 2D prep

Training

Browse our free online courses on Western blotting that cover tips and troubleshooting, total protein normalization, and imaging.

Start learning

Frequently asked questions about Western blotting

What does Western blotting test for in protein analysis workflows?

Western blotting is used to detect proteins within samples by combining electrophoresis, membrane transfer, and antibody-based detection. It involves separating proteins by molecular weight using gel electrophoresis, transfering them to a membrane, and using antibodies for detection. Western blotting is commonly used for protein expression analysis, biomarker validation, and confirming target engagement in drug development.

Why might a signal be weak or absent in Western blotting experiments?

A weak or absent signal in Western blotting is often caused by low protein concentration, inefficient transfer, poor antibody performance, or insufficient detection sensitivity. Troubleshooting typically focuses on sample quality, transfer conditions, and reagent selection. Using sensitive Western blot imaging systems can improve detection and reduce variability across experiments.

How can I improve reproducibility and quantitation in Western blotting?

Reproducibility in Western blotting depends on controlling variability throughout the workflow, including sample preparation, transfer efficiency, and detection conditions. Consistent loading, validated reagents, and calibrated Western blot imaging improve quantitation accuracy. Standardizing these steps supports comparable data across runs and laboratories, which is important for process development and regulated environments.

What membrane and detection options can help optimize my Western blot workflow?

Membrane and detection choices are key factors in Western blot workflow optimization. Nitrocellulose membranes provide low background and ease of handling, while PVDF offers higher protein binding capacity for low‑abundance targets. Detection methods such as chemiluminescence or fluorescence influence sensitivity, multiplexing capability, and quantitation performance within the workflow.

How do I choose the right Western blot imaging systems for my lab?

Selecting Western blot imaging systems depends on detection method, sensitivity requirements, and throughput needs. Chemiluminescent systems support high-sensitivity detection, while fluorescence-based systems enable multiplexing and improved quantification. Many modern Western blotting systems support a range of detection methods within one system. Software capabilities, dynamic range, and integration with existing lab processes are also important for consistent analysis and workflow efficiency.

What does Western blot workflow optimization focus on?

Western blot workflow optimization focuses on improving transfer consistency, reducing background signal, and standardizing detection conditions. Adjustments to membrane type, antibody incubation, and imaging parameters help improve signal‑to‑noise ratio and reproducibility. These changes support more reliable data generation across experiments and development stages.

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