Dickkopf (DKK) family proteins consist of four members DKK1, DKK2, DKK3 and DKK4 that function as secreted Wnt antagonists by inhibiting Wnt coreceptors LRP5 and LRP6 (1,2). DKKs contain two cysteine-rich domains in which the positions of 10 cysteine residues are well conserved (3). Their expression is both temporally and spatially regulated during animal development (4). DKKs also bind with high affinity to transmembrane proteins Kremen1 and 2, which themselves also modulate Wnt signaling (5,6).
DKK1 was initially identified as an inducer of head formation in Xenopus embryos (7) and plays an important role in the regulation of bone mass (8-10). Increased levels of DKK1 are found in the majority of lung cancers, esophageal squamous cell carcinomas, and hormone-resistant breast cancers (11,12), while DKK1 expression is decreased in malignant melanoma and colorectal cancers (13,14).
Applications
Suitable for use in Immunofluorescence, Western Blot, Immunohistochemistry. Other applications not tested.
Recommended Dilution
Western Blot: 1:200-1:500 Immunohistochemistry: 1:50-1:200 Immunofluorescence: 1:20-1:50 Optimal dilutions to be determined by the researcher.
Storage and Stability
May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
Immunogen
Recombinant protein corresponding to human DKK1 .
Form
Supplied as a liquid in PBS, pH 7.3, 0.02% sodium azide, 50% glycerol.
Purity
Purified by affinity chromatography.
Specificity
Recognizes DKK1. Species Crossreactivity: human, mouse, rat
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