CD19 (Intracellular Domain) Antibody

About the Target

CD19 (Intracellular Domain) is a target of interest in many antibody-based workflows. The intracellular (cytoplasmic) domain of CD19 is the C-terminal portion of this type I transmembrane glycoprotein and functions as a critical signaling adaptor in B cells. Comprising approximately 240 amino acids, the cytoplasmic domain contains at least nine conserved tyrosine residues, including key sites such as Y391, Y482, and Y513, which become phosphorylated upon B cell receptor (BCR) engagement. Depending on the literature source, CD19 (Intracellular Domain) may also be discussed as B-lymphocyte antigen CD19 and B-lymphocyte surface antigen B4.

Reported cellular context includes cellmembrane and membrane, which can matter when signal is compared across treatments or changing cell states. Following CD19 (Intracellular Domain) across matched perturbations can help separate abundance effects from shifts in localization, complex assembly, or pathway state.

Research Context

CD19 (Intracellular Domain) is commonly interpreted in the context of immunology, developmental biology, and cell signaling research, and readouts are often stronger when a study separates expression changes from compartment-level redistribution. When reported signal spans cellmembrane and membrane, a defined reference condition can make comparisons more interpretable across perturbations, passages, or replicate sets.

Consider these angles when interpreting target-level changes:

• apparent redistribution between cellmembrane and membrane across matched conditions
• context differences tied to immune-cell state, activation, or lineage composition
• stage-dependent patterns during differentiation, morphogenesis, or lineage commitment
• signal-dependent shifts after ligand, inhibitor, or growth-factor perturbation

Variant Considerations

If your project spans exploratory questions, the regular version offers a balanced option for establishing baseline signal behavior for CD19 (Intracellular Domain). This can help when protocols evolve over time and the goal is to compare experiments using a stable reference workflow.

Standardize sampling time, control choice, and downstream analysis thresholds so apparent differences in CD19 (Intracellular Domain) reflect biology rather than handling. When interpreting CD19 (Intracellular Domain), it is often useful to decide early whether the main question is overall abundance, compartmental enrichment, or context-dependent redistribution.

For multi-run studies, a shared reference condition can keep CD19 (Intracellular Domain) trends easier to compare across datasets. That kind of consistency is especially helpful when follow-up work expands to new perturbations, model systems, or longitudinal collections.