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

PE and PE-Tandem Conjugated CD Antibodies

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.

Custom Antibody Conjugation Services

For additional CD antibody labeling options, explore our Antibody Conjugation and Labeling Services or browse Custom Labeling Options.

Our Bioconjugation Technologies

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

This document (01.0282.251203r1) was last updated on Thu Feb 12 2026. All trademarks and registered trademarks mentioned herein are the property of their respective owners.

PE-CD Antibody Conjugates

PE and PE-Tandem Conjugated CD Antibodies

Custom Antibody Conjugation Services