Helen Frankenthaler Foundation

Pre-S region neutralizing antibody studies

Antibody Internalization - US

Antibody Internalization and Degradation Assays for ADC Discovery

Streamline your antibody-drug conjugate discovery workflows with our next-gen internalization and degradation assays

When antibodies bind to cell-surface receptors, they trigger endocytosis, internalizing the receptors and antibodies into the cell. This process is vital in research of targeted drug delivery to cancer cells, especially with antibody-drug conjugates (ADCs). ADCs are engineered antibodies linked to potent cytotoxic molecules, which can be trafficked to the lysosome for drug release and tumor cell death or recycled through the endosomal pathway.

Understanding the intracellular trafficking pathways is crucial for advancing drug discovery. ADCs or antibodies can be linked to our pH-sensitive pHrodo dyes to monitor internalization or to our LysoLight dyes to confirm lysosomal degradation, offering easy-to-use tools for effective drug discovery.

Explore pHrodo dye– or LysoLight dye–based assay offerings:

  • Specific late-endosome detection with pHrodo Deep Red
  • Reproducible, site-specific labeling with SiteClick pHrodo labeling systems
  • Rapid screening for antibody internalization with Zenon pHrodo reagents
  • Anti-dye antibodies as quench-based assays for studying antibody internalization
  • Direct detection of lysosomal degradation using LysoLight Deep Red and LysoLight Green

Internalization and degradation assay selection guide

pHrodo GreenpHrodo RedpHrodo Deep Red
OrganelleEarly endosome to lysosomeLate endosome and lysosome
Common filter setFITC/GFPTRITC/RFPCy5
Ex/Em (nm)505/525560/585640/655
Signal-to-noise ratioRepresentation of Star ratingsRepresentation of Star ratingsRepresentation of Star ratings