| 货号 | 12915C |
| 描述 | PathScan® Total Rb Sandwich ELISA Kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA) that detects endogenous levels of total Rb protein. An Rb antibody has been coated onto the microwells. After incubation with cell lysates, Rb protein is captured by the coated antibody. Following extensive washing, a biotinylated Rb Antibody is added to detect the captured Rb protein. HRP-linked Streptavidin is then used to recognize the bound detection antibody. HRP substrate, TMB, is added to develop color. The magnitude of optical density for this developed color is proportional to the quantity of total Rb protein. |
| 反应种属 | Human |
| 应用 | ELISA |
| 目标/特异性 | PathScan® Total Rb Sandwich ELISA Kit recognizes endogenous levels of Rb protein as shown in Figure 1. The kit sensitivity is shown in Figure 2. This kit detects proteins from the indicated species, as determined through in-house testing, but may also detect homologous proteins from other species. |
| 供应商 | CST |
| 背景 | The retinoblastoma tumor suppressor protein Rb regulates cell proliferation by controlling progression through the restriction point within the G1-phase of the cell cycle (1). Rb has three functionally distinct binding domains and interacts with critical regulatory proteins including the E2F family of transcription factors, c-Abl tyrosine kinase, and proteins with a conserved LXCXE motif (2-4). Cell cycle-dependent phosphorylation by a CDK inhibits Rb target binding and allows cell cycle progression (5). Rb inactivation and subsequent cell cycle progression likely requires an initial phosphorylation by cyclin D-CDK4/6 followed by cyclin E-CDK2 phosphorylation (6). Specificity of different CDK/cyclin complexes has been observed in vitro (6-8) and cyclin D1 is required for Ser780 phosphorylation in vivo(9). |
| 存放说明 | 4C |
| 参考文献 | Sherr, C.J. (1996) Science 274, 1672-7. Nevins, J.R. (1992) Science 258, 424-9. Welch, P.J. and Wang, J.Y. (1993) Cell 75, 779-90. Hu, Q.J. et al. (1990) EMBO J 9, 1147-55. Knudsen, E.S. and Wang, J.Y. (1997) Mol Cell Biol 17, 5771-83. Lundberg, A.S. and Weinberg, R.A. (1998) Mol Cell Biol 18, 753-61. Connell-Crowley, L. et al. (1997) Mol Biol Cell 8, 287-301. Kitagawa, M. et al. (1996) EMBO J 15, 7060-9. Geng, Y. et al. (2001) Proc Natl Acad Sci USA 98, 194-9. |
Figure 1: Treatment of serum-starved WI-38 cells (3 days) with serum for 2 days induces Rb protein expression, as detected by the PathScan® Total Rb Sandwich ELISA Kit #12915. The absorbance readings at 450 nm are shown in the top figure while the corresponding western blot using Rb (D20) Rabbit mAb #9313 is shown in the bottom figure.图1：使用PathScan® Total Rb Sandwich ELISA Kit #12915检测血清饥饿后（3天）再血清处理2天诱导Rb 蛋白的WI-38细胞。450nm的吸光值如上图所示，对应使用Rb (D20) Rabbit mAb #9313的western blot数据如下图。 | |
Figure 2: The relationship between protein concentration of lysates from Jurkat (Rb-positive) and Saos-2 (Rb-negative) cells and the absorbance at 450 nm is shown, as detected by the PathScan® Total Rb Sandwich ELISA Kit #12915.图2：使用PathScan® Total Rb Sandwich ELISA Kit #12915检测Jurkat (Rb-positive)和Saos-2 (Rb-negative)裂解液中蛋白浓度与450nm吸光值的关系如图所示。 |
