Assess specificity and off-target binding of your biotherapeutic candidates. De-risk your program and choose the right lead molecule.

6,000 Membrane proteins

Native binding in unfixed cells

IND-enabling report in  4  weeks

Is your antibody therapy firing at the right target?

Mistargeted therapies can cause serious side effects and clinical failures.

The Membrane Proteome Array is the leading solution for antibody specificity profiling. This cell-based array contains the largest set of human membrane proteins assembled to determine specificity and preclinical safety of antibodies, CAR-T cell therapies, and other biotherapeutics.

The leading solution for antibody specificity profiling

What makes the Membrane Proteome Array so successful?

6,000 membrane proteins  representing ~95% of the membrane proteome

High sensitivity flow cytometry detection, using unfixed cells to ensure native protein conformation and prevent false positives and negatives

Compatible with all biotherapeutics including monoclonal antibodies, scFv, VHH, bispecifics, peptides, and CAR-T cell therapies

 4-week turnaround for IND-enabling data package with option for full traceability and auditability

Successfully screened 1,000+ molecules 

Target validation by titration analysis

Developing CAR-T therapeutics?

MPA offers 3 ways to screen for off-target interactions

Off-target binding of CAR-T cell therapies can kill the wrong cells and result in severe or even life-threatening adverse events. We offer 3 specificity profiling services to assess CAR-T in vitro toxicology, including receptor binding via scFv, binding of CAR-T cells, or functional screens to assess cell killing or markers of T-cell activation.

“MPA technology quickly provided us with the reassurance that Abound Bio’s potent neutralizing antibodies to SARS-CoV-2 did not bind off-target human membrane proteins, which could be associated with toxicity.”

-John W. Mellors, MD, CEO, Abound Bio

What specificity data do you need for IND applications?

  • IND applications require assessment of off-target binding
  • Tissue cross-reactivity studies (TCR) have been traditionally employed for off-target screening
  • FDA guidelines suggest the use of alternative and newer technologies in lieu of TCR as these become available
Learn more about how Membrane Proteome Array data can help support your regulatory submission

What will your IND-enabling package include?

“We have been very pleased with the data that we obtained from the Membrane Proteome Array platform. This showed that our antibodies recognize only their select target, and not other membrane proteins in their panel."


What else can the Membrane Proteome Array provide?

Antibody Deorphaning Services

Learn how Totient (now AbSci) used the MPA to deorphan intratumoral antibodies and identify potential oncology targets

See case study


Functional Screening for Target Discovery

Discover new therapeutic targets by functional screening of the MPA in live cells

See application note

Publications Featuring the Membrane Proteome Array

Featured Case Studies

See how FairJourney established that their antibodies do not demonstrate off-target binding

Understand how a MAb can cross-react with a completely unrelated protein

Learn how the Membrane Proteome Array was used to deorphan panels of antibodies with unknown targets

Frequently Asked Questions

A typical MPA project takes 4 weeks from receipt of your antibodies.

The Membrane Proteome Array uses the largest membrane protein library ever assembled, flow cytometry, and unfixed cells for high-sensitivity detection, resulting in the broadest screens and the highest success rates. A typical project involves:

    • 1. You send us 500 µg of each antibody that you would like screened
    • 2. We optimize conditions for detecting antibody binding in our high-throughput system
    • 3. We screen your antibodies on the Membrane Proteome Array under optimized conditions
    • 4. We confirm all identified targets in a second flow cytometry titration experiment
    • 5. You receive a detailed report within 4 weeks containing the membrane protein binding profiles of your antibodies, the identity of validated targets, and publication-quality figures


You will receive a detailed report containing the binding profiles of your antibodies and results from a second validation screen (antibody titration screen) on any identified targets. The report contains publication-quality figures. Additional publication, patent, and IND filing support is available on request.

The MPA is very flexible regarding screening conditions. Typically, we screen under unfixed conditions, but can use permeabilizing or even serum-free conditions if needed. We will discuss the best conditions for your antibodies with you at the start of your project.

Hits are validated by testing serial dilutions of your antibodies for binding to cells over-expressing identified target(s) in a second flow cytometry experiment. This validation screen is included as part of every project.

Ready To Get Started?

We have worked with more than 100 top biotech and pharmaceutical companies to help them succeed. Let’s talk about how we can help you.

Or call (215) 966-6061