| Field | Specification |
|---|---|
| Mfr No | |
| Alternative Names | WAP four-disulfide core domain protein 2;Epididymal secretory protein E4;Major epididymis-specific protein E4;Putative protease inhibitor WAP5;WFDC2;HE4, WAP5; |
| Cellular Localization | |
| Clonality | |
| Concentration | |
| Host | |
| Immunogen | E. coli-derived human HE4 recombinant protein (Position: E31-F124). Human HE4 shares 40.4% and 68% amino acid (aa) sequence identity with mouse and rat HE4, respectively. |
| Isotype | |
| Molecular Weight | |
| Product Type | |
| Reactivity | |
| Reconstitution | |
| Target | |
| UniProt # |
Overview
This antibody is intended for detection of WFDC2 (WAP four-disulfide core domain protein 2) in biological samples using common immunoassay formats. It is typically selected based on target identity, species reactivity, clonality/clone information, and detection modality.
Vendor notes: Boster Bio Anti-HE4/WFDC2 Antibody Picoband® catalog # PB9963. Tested in ELISA, WB applications. This antibody reacts with Human. The brand Picoband indicates this is a premium antibody that guarantees superior quality, high affinity, and strong signals with minimal background in Western blot applications. Only our best-performing antibodies are designated as Picoband, ensuring unmatched performance.
Key elements and design rationale
- Antibody format: Rabbit Polyclonal Rabbit IgG
- Immunogen / epitope context: E. coli-derived human HE4 recombinant protein (Position: E31-F124). Human HE4 shares 40.4% and 68% amino acid (aa) sequence identity with mouse and rat HE4, respectively. (reported region: E31-F124).
- Molecular weight context: reported MW: 25 kDa; calculated MW: 12993 MW
- Reactivity: Human
- Applications: ELISA, WB
As a polyclonal antibody, the reagent recognizes multiple epitopes on the target, which can improve detection robustness but may increase sensitivity to sample-dependent epitope changes.
Biological background
WAP four-disulfide core domain protein 2; WAP four-disulfide core domain protein 2. WAP four-disulfide core domain protein 2, also known as Human Epididymis Protein 4 (HE4), is a protein that in humans is encoded by the WFDC2 gene. This gene encodes a protein that is a member of the WFDC domain family. The WFDC domain, or WAP Signature motif, contains eight cysteines forming four disulfide bonds at the core of the protein, and functions as a protease inhibitor in many family members. This gene is expressed in pulmonary epithelial cells, and was also found to be expressed in some ovarian cancers. The encoded protein is a small secretory protein, which may be involved in sperm maturation. Functional note: Broad range protease inhibitor. . Reported localization: Secreted . Expression/tissue context: Expressed in a number of normal tissues, including male reproductive system, regions of the respiratory tract and nasopharynx. Highly expressed in a number of tumors cells lines, such ovarian, colon, breast, lung and renal cells lines. Initially described as being exclusively transcribed in the epididymis. .
Research relevance and current trends
- Cell Type Markers: Researchers commonly examine how WFDC2 (WAP four-disulfide core domain protein 2) relates to this theme using model systems and orthogonal readouts.
- Tags & Cell Markers: Researchers commonly examine how WFDC2 (WAP four-disulfide core domain protein 2) relates to this theme using model systems and orthogonal readouts.
- Tumor Associated: Researchers commonly examine how WFDC2 (WAP four-disulfide core domain protein 2) relates to this theme using model systems and orthogonal readouts.
Common research applications
- Western blotting: compare relative WFDC2 (WAP four-disulfide core domain protein 2) levels across conditions; band patterns may reflect isoforms and processing.
- ELISA-compatible use: when applicable, interpret signal as relative abundance across sample sets with consistent handling and dilution strategy.
Notes for experimental interpretation
- Specificity notes: No cross reactivity with other proteins.
- Cross-reactivity: No cross-reactivity with other proteins
- Isoforms and PTMs: Apparent size and signal patterns can differ across splice isoforms, proteolytic processing, and post-translational modifications.
- Controls: Include an isotype control (as relevant), no-primary control for imaging, and orthogonal validation such as KD/KO samples when available.
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.
