| 货号 | AF4106-SP |
| 别名 | C20orf182; chromosome 20 open reading frame 182; Cristin 4; CRISTIN4; dJ824F16.3; FLJ16018; hRspo4; Roof plate-specific spondin-4; RSPO4; R-spondin family, member 4; R-spondin-4 | 全称 | Roof Plate-specific Spondin 4 |
| 反应种属 | Mouse |
| 应用 | Neutralization |
| 目标/特异性 | Detects mouse R-Spondin 4 in direct ELISAs. |
| 使用方法 | Neutralization: Measured by its ability to neutralize R‑Spondin 4-induced activation of beta ‑Catenin response in the HEK293T human embryonic kidney cell line in a Topflash Luciferase assay. The Neutralization Dose (ND50) is typically 5.0-20 µg/mL in the presence of 1 µg/mL Recombinant Mouse R‑Spondin 4 and 10 ng/mL Recombinant Mouse Wnt‑3a. |
| 来源 | Polyclonal Goat IgG |
| 产品组分 |
| 供应商 | R&D Systems |
| Entrez Gene IDs | 343637 (Human); 228770 (Mouse) |
| 纯化方式 | Antigen Affinity-purified |
| 免疫原 | E. coli-derived recombinant mouse R-Spondin 4 Tyr21-Pro197 Accession # Q8BJ73 |
| 内毒素水平 | <0.10 EU per 1 μg of the antibody by the LAL method. |
| 生物活性 | Mouse |
| 标记 | Unconjugated |
| 溶解方法 | Reconstitute at 0.2 mg/mL in sterile PBS. |
| 背景 | R-Spondin 4 (RSPO4, roof plate-specific spondin 4), also called cysteine-rich and single thrombospondin domain containing-4 (Cristin 4), is an ~33 kDa secreted heparin-binding protein that shares ~35% amino acid (aa) identity with three other R-Spondin family members (1-3). All are positive modulators of Wnt/ beta -catenin signaling, but R-Spondin 4 may be somewhat weaker than other R-Spondins (2). R‑Spondins regulate Wnt/ beta -catenin by competing with the Wnt antagonist DKK-1 for binding to the Wnt co-receptors LRP-6 and Kremen, reducing their DKK‑1‑mediated internalization (1, 4). Like other R‑Spondins, mouse R-Spondin 4 (234 aa) contains a signal sequence (aa 1-19), two adjacent cysteine-rich furin-like domains (aa 85-128) with one potential tyrosine phosphorylation site (aa 114), followed by a thrombospondin (TSP-1) motif (aa 137‑197) and a region rich in basic residues (aa 199‑234). The furin-like domains are sufficient for beta -catenin stabilization (2). Mature mouse R‑Spondin 4 shares 81%, 97%, 79%, 77% and 76% aa identity with human, rat, bovine, equine and canine R-Spondin 4, respectively. There is one potential isoform where Arg substitutes for the C‑terminal 82 amino acids (5). Each R‑Spondin has a distinct expression pattern (6). In the mouse, R‑Spondin 4 mRNA is found during development of limb bud mesenchyme, nail beds, heart and teeth (6‑8). In humans, mutations of R‑Spondin 4 have been found to cause anonychia, a condition in which fingernails and toenails are absent (8‑10). |
| 运输条件 | Blue Ice |
| 存放说明 | 4℃ |
| 参考文献 |
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