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PE-CD Antibody Conjugates
PE-CD antibody conjugates are primary antibodies pre-labeled with phycoerythrin (PE) and PE tandem dyes for direct detection of cluster of differentiation (CD) cell surface markers. These conjugates enable streamlined flow cytometry workflows for immunophenotyping. AAT Bioquest offers PE-conjugated antibodies targeting key CD markers for lymphocyte subset identification, immune cell characterization, and clinical diagnostics research.
| CD Marker | Synonyms | Primary Cell Types | Common Applications |
|---|---|---|---|
| CD3 | T3 | T lymphocytes | Pan-T cell marker, T cell activation studies |
| CD4 | T4, Leu-3 | Helper T cells, monocytes | T helper cell identification, HIV research, immunocompetence assessment |
| CD8 | T8, Leu-2 | Cytotoxic T lymphocytes, NK cells | CTL identification, immune monitoring, tumor-infiltrating lymphocyte analysis |
| CD14 | LPS receptor, Monocyte marker | Monocytes, macrophages | Monocyte gating, inflammation studies, bacterial response assessment |
| CD19 | B4 | B lymphocytes | Pan-B cell marker, lymphoma typing, B cell lymphoma classification |
| CD20 | B1, Bp35 | B lymphocytes | B cell development, rituximab therapy monitoring, B cell malignancy detection |
| CD25 | IL-2Ralpha | Activated T cells, regulatory T cells (Tregs) | Regulatory T cell identification, T cell activation marker, immunosuppression studies |
| CD34 | Mucosialin | Hematopoietic stem and progenitor cells | Stem cell enumeration, transplant monitoring, hematopoietic assessment |
| CD45 | LCA (Leukocyte Common Antigen) | All leukocytes | Pan-leukocyte gating, lymphoma diagnosis, immune cell enumeration |
| CD56 | NCAM (Neural Cell Adhesion Molecule) | Natural killer (NK) cells, NKT cells | NK cell identification, immunotherapy monitoring, cancer immunology studies |
Phycoerythrin (PE) is a highly fluorescent phycobiliprotein with exceptional brightness (Ex = 496, 564 nm, Em = 578 nm), making it one of the most widely used fluorophores for flow cytometry. PE-CD conjugates provide direct detection of cell surface markers without requiring secondary antibodies, enabling faster protocols and reduced background in multicolor panels. For researchers requiring additional spectral options, AAT Bioquest also offers PE tandem dye conjugates that extend PE's emission into the far-red and near-infrared spectrum. These tandems utilize fluorescence resonance energy transfer (FRET) from PE to an acceptor dye, providing distinct emission channels while maintaining single-laser excitation compatibility.
- High brightness – PE offers superior fluorescence intensity compared to small molecule dyes, ideal for detecting low-expression markers
- Direct detection format – Pre-conjugated antibodies eliminate secondary antibody steps, reducing protocol time and potential cross-reactivity
- Single-laser excitation – All PE tandems excite with 488 nm or 561 nm lasers, simplifying instrument configuration
- Spectral flexibility – Tandem emissions ranging from 670 nm to 780 nm enable expanded multicolor panels
- Validated for flow cytometry – Optimized antibody-to-fluorophore ratios ensure consistent performance across experiments
The table below lists all available PE and PE-tandem CD antibody conjugates organized by CD target. Click any clone name to view the product page.
For additional CD antibody labeling options, explore our Antibody Conjugation and Labeling Services or browse Custom Labeling Options.
ReadiLink™ — High-yield labeling with small molecules such as fluorescent dyes, no purification required
Buccutite™ — Proprietary chemistry optimized for labeling with proteins like HRP, PE, and APC
ReadiUse™ — One-step labeling with preactivated dyes and tags, ideal for quick conjugation workflows
Buccutite™ — Proprietary chemistry optimized for labeling with proteins like HRP, PE, and APC
ReadiUse™ — One-step labeling with preactivated dyes and tags, ideal for quick conjugation workflows
This document (01.0282.251203r1) was last updated on Thu Nov 12 2026. All trademarks and registered trademarks mentioned herein are the property of their respective owners.
PE-CD Antibody Conjugates