CD103 APC-iFluor700

Overview

CD103 APC-iFluor700 is a Mouse monoclonal targeting CD103, supplied as a APC-iFluor700 format for FC workflows. It supports measurement of Human target expression in common experimental systems.

Key elements and design rationale

• Clone: CBI.162 — consistent clone identity can support panel reproducibility and cross-study comparisons.
• Isotype: IgG1, k — informs selection of matched controls and secondary reagents when relevant.
• Conjugate: APC-iFluor700 — enables direct detection in fluorescence-based assays. Excitation is typically matched to Red (638nm) lasers in cytometer configurations.
• Host species: Mouse — useful for panel design and control strategy planning.
• Reactivity: Human — interpret staining in the context of species-specific sequence and expression differences.

Key specifications such as clone identity, isotype, and fluorophore conjugation help researchers align panel design, control selection, and instrument configuration with the biological question and sample type.

Biological background

CD103, also known as αE integrin or human mucosal lymphocyte antigen 1, is a type I transmembrane glycoprotein belonging to the integrin family. It is primarily expressed on intestinal intraepithelial lymphocytes (IELs), as well as a subset of lamina propria T cells, epithelial and lamina propria-derived dendritic cells, and a small population of peripheral lymphocytes. Regulatory T cells (Tregs) also exhibit high levels of CD103 expression. Additionally, CD103 is a marker for hairy cell leukemia and can be induced on lymphocytes upon activation and TGF-β stimulation. CD103 forms a heterodimer with integrin β7 (αE/β7) and plays a crucial role in mediating lymphocyte adhesion by binding to E-cadherin, facilitating homing to the intestinal epithelium. The mature protein undergoes cleavage, yielding a 150 kDa C-terminal chain and a 25 kDa N-terminal chain, linked by disulfide bonds. It reacts with most T cells in the oral and bronchial mucosa and is found in CD8+CD103+ cytolytic T lymphocytes, which are involved in graft rejection by attacking transplanted epithelial cells.

Research relevance and current trends

• High-parameter immunophenotyping: combining CD103 with complementary lineage and activation markers to resolve complex cell states.
• Panel standardization and data comparability: increasing emphasis on consistent reagents, compensation-aware fluorophore choices, and shared gating strategies.
• Integration with single-cell multi-omics: pairing surface marker profiling with transcriptomic or proteomic readouts to connect phenotype to function.

Common research applications

• Flow cytometry: quantify CD103-positive populations and compare expression distributions across conditions or time points.
• Cell sorting: enrich CD103-defined subsets for downstream RNA/protein assays or functional readouts.

Changes in measured signal are typically interpreted in the context of cell subset frequency, activation/differentiation state, and sample processing effects rather than as a standalone readout.

Notes for experimental interpretation

• Fluorophore selection: consider brightness, spectral overlap, and instrument configuration; compensation and spillover can affect apparent population boundaries.
• Biology-driven confounders: activation state, differentiation, and isoform/PTM variation can shift epitope accessibility and apparent expression.
• Control concepts: include matched isotype and fluorescence-minus-one (FMO) controls where appropriate, and interpret results alongside biological positive/negative reference samples.

For antibody-based assays, monoclonal versus polyclonal format can influence epitope recognition breadth and signal consistency. Conjugated antibodies support direct detection and can simplify multicolor panel design when paired with appropriate controls and instrument settings.

Customization & Add-ons: Can’t find the antibody you need—or require a custom format for your assay? We can help you source the best match or support custom antibody solutions for diverse research needs, including species and isotype selection, conjugations and labeling (e.g., HRP/AP, biotin, fluorophores), purification grade options (Protein A/G, affinity purified), formulation preferences (buffer selection, carrier-free, glycerol-free), custom concentrations and aliquoting, low-endotoxin options for cell-based work, and application-focused QC/validation support (project dependent). Click Talk to a Scientist to submit a request, email us at support@biohippo.com, or explore our Research Services for additional support—our team will follow up with feasibility details and next steps.