null

Human RBL1 / Retinoblastoma-like protein 1 ELISA Kit

SKU:
HUFI01114
Product Type:
ELISA Kit
Size:
96 Assays
Uniprot:
P28749
Sensitivity:
0.938ng/ml
Range:
1.563-100ng/ml
ELISA Type:
Sandwich
Synonyms:
RBL1, Retinoblastoma-like protein 1, 107 kDa retinoblastoma-associated protein, p107
Reactivity:
Human
Research Area:
Cell Cycle
€599
Frequently bought together:

Description

system_update_altDatasheetsystem_update_altMSDS

Human RBL1 / Retinoblastoma-like protein 1 ELISA Kit

The protein encoded by RBL1/Retinoblastoma-like protein 1 is similar to the retinoblastoma 1 (RB1) gene's product in sequence and possibly function. The RB1 gene product appears to be involved in cell cycle regulation, as it is phosphorylated during the S to M phase transition and dephosphorylated during the G1 phase of the cell cycle. Adenovirus E1A protein and SV40 large T-antigen can form a complex with both the RB1 protein and the product of this gene, with the SV40 large T-antigen binding only to the unphosphorylated form of each protein. Both proteins have the ability to prevent the transcription of cell cycle genes with E2F binding sites in their promoters. The protein encoded by RBL1/Retinoblastoma-like protein 1 is thought to be a tumour suppressor due to sequence and biochemical similarities with the RB1 protein. Retinoblastoma and Bilateral Retinoblastoma are two diseases linked to RBL1.

Product Name:Human RBL1 / Retinoblastoma-like protein 1 ELISA Kit
Product Code:HUFI01114
Size:96 Assays
Alias:RBL1, Retinoblastoma-like protein 1, 107 kDa retinoblastoma-associated protein, p107
Detection method:Sandwich ELISA, Double Antibody
Application:This immunoassay kit allows for the in vitro quantitative determination of Human RBL1 concentrations in serum plasma and other biological fluids.
Sensitivity:0.938ng/ml
Range:1.56-100ng/ml
Storage:4°C for 6 months
Note:For Research Use Only
Recovery:Matrices listed below were spiked with certain level of Human RBL1 and the recovery rates were calculated by comparing the measured value to the expected amount of Human RBL1 in samples.
MatrixRecovery range(%)Average(%)
serum(n=5)86-10591
EDTA plasma(n=5)95-10198
UFH plasma(n=5)88-10294
Linearity:The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human RBL1 and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.
Sample1:21:41:8
serum(n=5)85-100%91-104%87-103%
EDTA plasma(n=5)83-97%84-98%83-101%
UFH plasma(n=5)80-96%81-99%83-99%
CV(%):Intra-Assay: CV<8%
Inter-Assay: CV<10%
ComponentQuantityStorage
ELISA Microplate (Dismountable)8×12 strips4°C for 6 months
Lyophilized Standard24°C/-20°C
Sample/Standard Dilution Buffer20ml4°C
Biotin-labeled Antibody(Concentrated)120ul4°C (Protect from light)
Antibody Dilution Buffer10ml4°C
HRP-Streptavidin Conjugate(SABC)120ul4°C (Protect from light)
SABC Dilution Buffer10ml4°C
TMB Substrate10ml4°C (Protect from light)
Stop Solution10ml4°C
Wash Buffer(25X)30ml4°C
Plate Sealer5-

Other materials and equipment required:

  • Microplate reader with 450 nm wavelength filter
  • Multichannel Pipette, Pipette, microcentrifuge tubes and disposable pipette tips
  • Incubator
  • Deionized or distilled water
  • Absorbent paper
  • Buffer resevoir
UniprotP28749
UniProt Protein Function:Rb-like 1: Key regulator of entry into cell division. Directly involved in heterochromatin formation by maintaining overall chromatin structure and, in particular, that of constitutive heterochromatin by stabilizing histone methylation. Recruits and targets histone methyltransferases SUV420H1 and SUV420H2, leading to epigenetic transcriptional repression. Controls histone H4 'Lys-20' trimethylation. Probably acts as a transcription repressor by recruiting chromatin-modifying enzymes to promoters. Potent inhibitor of E2F-mediated trans-activation. Forms a complex with adenovirus E1A and with SV40 large T antigen. May bind and modulate functionally certain cellular proteins with which T and E1A compete for pocket binding. May act as a tumor suppressor. Belongs to the retinoblastoma protein (RB) family. 2 isoforms of the human protein are produced by alternative splicing.
UniProt Protein Details:Protein type:Tumor suppressor; Transcription, coactivator/corepressor

Chromosomal Location of Human Ortholog: 20q11.2

Cellular Component: nucleoplasm; transcription factor complex; nucleus

Molecular Function:protein binding; transcription factor binding

Biological Process: transcription initiation from RNA polymerase II promoter; transcription, DNA-dependent; viral reproduction; regulation of cell cycle; transforming growth factor beta receptor signaling pathway; gene expression; positive regulation of transcription from RNA polymerase II promoter; chromatin modification; mitotic cell cycle; regulation of lipid kinase activity; negative regulation of transcription from RNA polymerase II promoter

NCBI Summary:The protein encoded by this gene is similar in sequence and possibly function to the product of the retinoblastoma 1 (RB1) gene. The RB1 gene product is a tumor suppressor protein that appears to be involved in cell cycle regulation, as it is phosphorylated in the S to M phase transition and is dephosphorylated in the G1 phase of the cell cycle. Both the RB1 protein and the product of this gene can form a complex with adenovirus E1A protein and SV40 large T-antigen, with the SV40 large T-antigen binding only to the unphosphorylated form of each protein. In addition, both proteins can inhibit the transcription of cell cycle genes containing E2F binding sites in their promoters. Due to the sequence and biochemical similarities with the RB1 protein, it is thought that the protein encoded by this gene may also be a tumor suppressor. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]
UniProt Code:P28749
NCBI GenInfo Identifier:90103515
NCBI Gene ID:5933
NCBI Accession:P28749.3
UniProt Secondary Accession:P28749,Q4VXA0, Q8N5K6, Q9H1L5, Q9H1M1, A8K2W5,
UniProt Related Accession:P28749
Molecular Weight:114,688 Da
NCBI Full Name:Retinoblastoma-like protein 1
NCBI Synonym Full Names:retinoblastoma-like 1
NCBI Official Symbol:RBL1
NCBI Official Synonym Symbols:PRB1; p107; CP107
NCBI Protein Information:retinoblastoma-like protein 1; cellular protein 107; retinoblastoma-like 1 (p107); 107 kDa retinoblastoma-associated protein
UniProt Protein Name:Retinoblastoma-like protein 1
UniProt Synonym Protein Names:107 kDa retinoblastoma-associated protein; p107; pRb1
Protein Family:RHOMBOID-like protein
UniProt Gene Name:RBL1
UniProt Entry Name:RBL1_HUMAN

*Note: Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.

Before adding to wells, equilibrate the SABC working solution and TMB substrate for at least 30 min at 37°C. When diluting samples and reagents, they must be mixed completely and evenly. It is recommended to plot a standard curve for each test.

StepProtocol
1.Set standard, test sample and control (zero) wells on the pre-coated plate respectively, and then, record their positions. It is recommended to measure each standard and sample in duplicate. Wash plate 2 times before adding standard, sample and control (zero) wells!
2.Aliquot 0.1ml standard solutions into the standard wells.
3.Add 0.1 ml of Sample / Standard dilution buffer into the control (zero) well.
4.Add 0.1 ml of properly diluted sample ( Human serum, plasma, tissue homogenates and other biological fluids.) into test sample wells.
5.Seal the plate with a cover and incubate at 37 °C for 90 min.
6.Remove the cover and discard the plate content, clap the plate on the absorbent filter papers or other absorbent material. Do NOT let the wells completely dry at any time. Wash plate X2.
7.Add 0.1 ml of Biotin- detection antibody working solution into the above wells (standard, test sample & zero wells). Add the solution at the bottom of each well without touching the side wall.
8.Seal the plate with a cover and incubate at 37°C for 60 min.
9.Remove the cover, and wash plate 3 times with Wash buffer. Let wash buffer rest in wells for 1 min between each wash.
10.Add 0.1 ml of SABC working solution into each well, cover the plate and incubate at 37°C for 30 min.
11.Remove the cover and wash plate 5 times with Wash buffer, and each time let the wash buffer stay in the wells for 1-2 min.
12.Add 90 µl of TMB substrate into each well, cover the plate and incubate at 37°C in dark within 10-20 min. (Note: This incubation time is for reference use only, the optimal time should be determined by end user.) And the shades of blue can be seen in the first 3-4 wells (with most concentrated standard solutions), the other wells show no obvious color.
13.Add 50 µl of Stop solution into each well and mix thoroughly. The color changes into yellow immediately.
14. Read the O.D. absorbance at 450 nm in a microplate reader immediately after adding the stop solution.

When carrying out an ELISA assay it is important to prepare your samples in order to achieve the best possible results. Below we have a list of procedures for the preparation of samples for different sample types.

Sample TypeProtocol
SerumIf using serum separator tubes, allow samples to clot for 30 minutes at room temperature. Centrifuge for 10 minutes at 1,000x g. Collect the serum fraction and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles.

If serum separator tubes are not being used, allow samples to clot overnight at 2-8°C. Centrifuge for 10 minutes at 1,000x g. Remove serum and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles.

PlasmaCollect plasma using EDTA or heparin as an anticoagulant. Centrifuge samples at 4°C for 15 mins at 1000 × g within 30 mins of collection. Collect the plasma fraction and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles. Note: Over haemolysed samples are not suitable for use with this kit.
Urine & Cerebrospinal FluidCollect the urine (mid-stream) in a sterile container, centrifuge for 20 mins at 2000-3000 rpm. Remove supernatant and assay immediately. If any precipitation is detected, repeat the centrifugation step. A similar protocol can be used for cerebrospinal fluid.
Cell culture supernatantCollect the cell culture media by pipette, followed by centrifugation at 4°C for 20 mins at 1500 rpm. Collect the clear supernatant and assay immediately.
Cell lysatesSolubilize cells in lysis buffer and allow to sit on ice for 30 minutes. Centrifuge tubes at 14,000 x g for 5 minutes to remove insoluble material. Aliquot the supernatant into a new tube and discard the remaining whole cell extract. Quantify total protein concentration using a total protein assay. Assay immediately or aliquot and store at ≤ -20 °C.
Tissue homogenatesThe preparation of tissue homogenates will vary depending upon tissue type. Rinse tissue with 1X PBS to remove excess blood & homogenize in 20ml of 1X PBS (including protease inhibitors) and store overnight at ≤ -20°C. Two freeze-thaw cycles are required to break the cell membranes. To further disrupt the cell membranes you can sonicate the samples. Centrifuge homogenates for 5 mins at 5000xg. Remove the supernatant and assay immediately or aliquot and store at -20°C or -80°C.
Tissue lysatesRinse tissue with PBS, cut into 1-2 mm pieces, and homogenize with a tissue homogenizer in PBS. Add an equal volume of RIPA buffer containing protease inhibitors and lyse tissues at room temperature for 30 minutes with gentle agitation. Centrifuge to remove debris. Quantify total protein concentration using a total protein assay. Assay immediately or aliquot and store at ≤ -20 °C.
Breast MilkCollect milk samples and centrifuge at 10,000 x g for 60 min at 4°C. Aliquot the supernatant and assay. For long term use, store samples at -80°C. Minimize freeze/thaw cycles.

Related Products