Human C3BR / CD35 / Complement Receptor type 1 ELISA Kit
- SKU:
- HUFI02361
- Product Type:
- ELISA Kit
- Size:
- 96 Assays
- Uniprot:
- P17927
- Sensitivity:
- 0.094ng/ml
- Range:
- 0.156-10ng/ml
- ELISA Type:
- Sandwich
- Synonyms:
- CR1, C3BR, CD35, complement component, 3b, 4b receptor 1, Knops blood group, KN
- Reactivity:
- Human
- Research Area:
- Immunology
Description
Human C3BR/CD35/Complement Receptor type 1 ELISA Kit
The Human C3bR (CD35) Complement Receptor Type 1 ELISA Kit is a reliable and accurate tool for detecting levels of the CD35 complement receptor type 1 in human samples such as serum, plasma, and cell culture supernatants. This kit offers high sensitivity and specificity, ensuring consistent and precise results for a variety of research applications.The CD35 complement receptor type 1 is a key protein involved in the regulation of the complement system, an integral part of the immune response. Dysregulation of this receptor has been associated with various autoimmune diseases and inflammatory conditions.
Therefore, measuring CD35 levels can provide valuable insights into the underlying mechanisms of these diseases and help in the development of targeted therapies.With its straightforward protocol and superior performance, the Human C3bR (CD35) Complement Receptor Type 1 ELISA Kit is an essential tool for researchers investigating the role of the complement system in disease pathogenesis and exploring novel treatment strategies.
| Product Name: | Human C3BR / CD35 / Complement Receptor type 1 ELISA Kit |
| Product Code: | HUFI02361 |
| Size: | 96 Assays |
| Alias: | CR1, C3BR, CD35, complement component, 3b, 4b receptor 1, Knops blood group, KN |
| Detection method: | Sandwich ELISA, Double Antibody |
| Application: | This immunoassay kit allows for the in vitro quantitative determination of Human CR1 concentrations in serum plasma and other biological fluids. |
| Sensitivity: | 0.094ng/ml |
| Range: | 0.156-10ng/ml |
| Storage: | 4°C for 6 months |
| Note: | For Research Use Only |
| Recovery: | Matrices listed below were spiked with certain level of Human CR1 and the recovery rates were calculated by comparing the measured value to the expected amount of Human CR1 in samples. | ||||||||||||||||
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| Linearity: | The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human CR1 and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected. | ||||||||||||||||
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| CV(%): | Intra-Assay: CV<8% Inter-Assay: CV<10% |
| Component | Quantity | Storage |
| ELISA Microplate (Dismountable) | 8×12 strips | 4°C for 6 months |
| Lyophilized Standard | 2 | 4°C/-20°C |
| Sample/Standard Dilution Buffer | 20ml | 4°C |
| Biotin-labeled Antibody(Concentrated) | 120ul | 4°C (Protect from light) |
| Antibody Dilution Buffer | 10ml | 4°C |
| HRP-Streptavidin Conjugate(SABC) | 120ul | 4°C (Protect from light) |
| SABC Dilution Buffer | 10ml | 4°C |
| TMB Substrate | 10ml | 4°C (Protect from light) |
| Stop Solution | 10ml | 4°C |
| Wash Buffer(25X) | 30ml | 4°C |
| Plate Sealer | 5 | - |
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
| Uniprot | P17927 |
| UniProt Protein Function: | CR1: Mediates cellular binding of particles and immune complexes that have activated complement. Belongs to the receptors of complement activation (RCA) family. |
| UniProt Protein Details: | Protein type:Membrane protein, integral; Receptor, misc. Chromosomal Location of Human Ortholog: 1q32 Cellular Component: cell surface; integral to plasma membrane; plasma membrane Molecular Function:complement component C3b receptor activity; complement component C4b binding; complement component C4b receptor activity; complement component C3b binding Biological Process: negative regulation of complement activation, alternative pathway; complement receptor mediated signaling pathway; negative regulation of complement activation, classical pathway; regulation of complement activation; innate immune response; complement activation, classical pathway Disease: Knops Blood Group System; Malaria, Susceptibility To |
| NCBI Summary: | This gene is a member of the receptors of complement activation (RCA) family and is located in the °Cluster RCA' region of chromosome 1. The gene encodes a monomeric single-pass type I membrane glycoprotein found on erythrocytes, leukocytes, glomerular podocytes, and splenic follicular dendritic cells. The Knops blood group system is a system of antigens located on this protein. The protein mediates cellular binding to particles and immune complexes that have activated complement. Decreases in expression of this protein and/or mutations in its gene have been associated with gallbladder carcinomas, mesangiocapillary glomerulonephritis, systemic lupus erythematosus and sarcoidosis. Mutations in this gene have also been associated with a reduction in Plasmodium falciparum rosetting, conferring protection against severe malaria. Alternate allele-specific splice variants, encoding different isoforms, have been characterized. Additional allele specific isoforms, including a secreted form, have been described but have not been fully characterized. [provided by RefSeq, Jul 2008] |
| UniProt Code: | P17927 |
| NCBI GenInfo Identifier: | 86793036 |
| NCBI Gene ID: | 1378 |
| NCBI Accession: | NP_000564.2 |
| UniProt Secondary Accession: | P17927,Q16744, Q16745, Q5SR43, Q5SR45, Q9UQV2, |
| UniProt Related Accession: | P17927 |
| Molecular Weight: | 223,663 Da |
| NCBI Full Name: | complement receptor type 1 isoform F |
| NCBI Synonym Full Names: | complement component (3b/4b) receptor 1 (Knops blood group) |
| NCBI Official Symbol: | CR1 |
| NCBI Official Synonym Symbols: | KN; C3BR; C4BR; CD35 |
| NCBI Protein Information: | complement receptor type 1 |
| UniProt Protein Name: | Complement receptor type 1 |
| UniProt Synonym Protein Names: | C3b/C4b receptor; CD_antigen: CD35 |
| Protein Family: | Complement receptor |
| UniProt Gene Name: | CR1 |
| UniProt Entry Name: | CR1_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.
| Step | Protocol |
| 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 Type | Protocol |
| Serum | If 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. |
| Plasma | Collect 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 Fluid | Collect 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 supernatant | Collect 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 lysates | Solubilize 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 homogenates | The 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 lysates | Rinse 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 Milk | Collect 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. |
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