Anti-HE4/WFDC2 Antibody Picoband®

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.

WAP four-disulfide core domain protein 2; Epididymal secretory protein E4; Major epididymis-specific protein E4; Putative protease inhibitor WAP5; WFDC2; HE4, WAP5

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.

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. .

1. Entrez Gene: WFDC2 WAP four-disulfide core domain 2. 2. Hellström I, Raycraft J, Hayden-Ledbetter M, Ledbetter JA, Schummer M, McIntosh M, Drescher C, Urban N, Hellström KE (2003-07-01) . The HE4 (WFDC2) Protein Is a Biomarker for Ovarian Carcinoma. Cancer Research63 (13) : 3695–3700. 3. Molina R, Escudero JM, Augé JM, Filella X, Foj L, Torné A, Lejarcegui J, Pahisa J (2011) . HE4 a novel tumour marker for ovarian cancer: Comparison with CA 125 and ROMA algorithm in patients with gynaecological diseases. Tumor Biology 32 (6) : 1087–95.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.