Rat H-2 class II histocompatibility antigen gamma chain (Cd74) ELISA Kit
The Rat H-2 Class II Histocompatibility Antigen Gamma Chain (CD74) ELISA Kit is a powerful tool designed for the precise and reliable measurement of CD74 levels in rat samples including serum, plasma, and cell culture supernatants. This kit offers exceptional sensitivity and specificity, ensuring accurate and reproducible results for a variety of research purposes.CD74, also known as the H-2 gamma chain, is a critical component of the immune system, playing a key role in antigen presentation and immune response regulation. Studies have shown that abnormalities in CD74 expression can be linked to various diseases, including autoimmune disorders, infectious diseases, and cancer.
This ELISA kit provides researchers with a valuable tool to investigate the role of CD74 in such conditions, aiding in the development of novel therapeutic strategies.Overall, the Rat H-2 Class II Histocompatibility Antigen Gamma Chain (CD74) ELISA Kit is a comprehensive solution for studying CD74 dynamics in rat samples, offering precise and reliable results essential for advancing our understanding of immune system function and disease pathogenesis.
Product Name:
Rat H-2 class II histocompatibility antigen gamma chain (Cd74) ELISA Kit
SKU:
RTEB0911
Size:
96T
Target:
Rat H-2 class II histocompatibility antigen gamma chain (Cd74)
Synonyms:
Ia antigen-associated invariant chain, MHC class II-associated invariant chain, Ii, CD74
Assay Type:
Sandwich
Detection Method:
ELISA
Reactivity:
Rat
Detection Range:
0.312-20ng/mL
Sensitivity:
0.156ng/mL
Intra CV:
4.4%
Inter CV:
6.9%
Linearity:
Sample
1:2
1:4
1:8
1:16
Serum(N=5)
95-105%
88-97%
104-114%
87-99%
EDTA Plasma(N=5)
85-93%
107-116%
98-108%
94-104%
Heparin Plasma(N=5)
105-115%
84-93%
90-99%
109-118%
Recovery:
Sample Type
Average(%)
Recovery Range(%)
Serum
89
83-95
Plasma
91
85-97
Function:
Plays a critical role in MHC class II antigen processing by stabilizing peptide-free class II alpha/beta heterodimers in a complex soon after their synthesis and directing transport of the complex from the endoplasmic reticulum to compartments where peptide loading of class II takes place.
Uniprot:
P10247
Sample Type:
Serum, plasma, tissue homogenates, cell culture supernates and other biological fluids
Specificity:
Natural and recombinant rat H-2 class II histocompatibility antigen gamma chain
Sub Unit:
Nonamer composed of three alpha/beta/gamma heterotrimers.
Research Area:
Cancer
Subcellular Location:
Membrane Single-pass type II membrane protein
Storage:
Please see kit components below for exact storage details
Note:
For research use only
UniProt Protein Function:
CD74: Plays a critical role in MHC class II antigen processing by stabilizing peptide-free class II alpha/beta heterodimers in a complex soon after their synthesis and directing transport of the complex from the endoplasmic reticulum to the endosomal/lysosomal system where the antigen processing and binding of antigenic peptides to MHC class II takes place. Serves as cell surface receptor for the cytokine MIF. A chromosomal aberration involving CD74 is found in a non-small cell lung tumor. Results in the formation of a CD74- ROS1 chimeric protein. 3 isoforms of the human protein are produced by alternative splicing.Protein type: Endoplasmic reticulum; Membrane protein, integral; Receptor, cytokineCellular Component: cell surface; endoplasmic reticulum; external side of plasma membrane; Golgi apparatus; integral to membrane; late endosome; lysosome; membrane; MHC class II protein complex; multivesicular body; plasma membrane; vacuoleMolecular Function: beta-amyloid binding; cytokine binding; hematopoietin/interferon-class (D200-domain) cytokine receptor activity; MHC class II protein binding; MHC class II protein binding, via antigen binding groove; nitric-oxide synthase bindingBiological Process: activation of MAPK activity; antigen processing and presentation; antigen processing and presentation of exogenous peptide antigen via MHC class II; cell proliferation; chaperone cofactor-dependent protein folding; defense response; immunoglobulin mediated immune response; intracellular protein transport; negative regulation of apoptosis; negative regulation of DNA damage response, signal transduction by p53 class mediator; negative regulation of mature B cell apoptosis; negative regulation of peptide secretion; negative regulation of T cell differentiation; negative thymic T cell selection; positive regulation of B cell proliferation; positive regulation of cytokine and chemokine mediated signaling pathway; positive regulation of dendritic cell antigen processing and presentation; positive regulation of fibroblast proliferation; positive regulation of peptidyl-tyrosine phosphorylation; positive regulation of T cell differentiation; positive regulation of T-helper 2 type immune response; positive thymic T cell selection; prostaglandin biosynthetic process; protein complex assembly; signal transduction
H-2 class II histocompatibility antigen gamma chain
NCBI Synonym Full Names:
CD74 molecule
NCBI Official Symbol:
Cd74
NCBI Official Synonym Symbols:
INVG34
NCBI Protein Information:
H-2 class II histocompatibility antigen gamma chain
UniProt Protein Name:
H-2 class II histocompatibility antigen gamma chain
UniProt Synonym Protein Names:
Ia antigen-associated invariant chain; Ii; MHC class II-associated invariant chain; CD_antigen: CD74
Protein Family:
H-2 class II histocompatibility antigen
UniProt Gene Name:
Cd74
UniProt Entry Name:
HG2A_RAT
Component
Quantity (96 Assays)
Storage
ELISA Microplate (Dismountable)
8×12 strips
-20°C
Lyophilized Standard
2
-20°C
Sample Diluent
20ml
-20°C
Assay Diluent A
10mL
-20°C
Assay Diluent B
10mL
-20°C
Detection Reagent A
120µL
-20°C
Detection Reagent B
120µL
-20°C
Wash Buffer
30mL
4°C
Substrate
10mL
4°C
Stop Solution
10mL
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
*Note: The below protocol is a sample protocol. Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.
Allow all reagents to reach room temperature (Please do not dissolve the reagents at 37°C directly). All the reagents should be mixed thoroughly by gently swirling before pipetting. Avoid foaming. Keep appropriate numbers of strips for 1 experiment and remove extra strips from microtiter plate. Removed strips should be resealed and stored at -20°C until the kits expiry date. Prepare all reagents, working standards and samples as directed in the previous sections. Please predict the concentration before assaying. If values for these are not within the range of the standard curve, users must determine the optimal sample dilutions for their experiments. We recommend running all samples in duplicate.
Step
1.
Add Sample: Add 100µL of Standard, Blank, or Sample per well. The blank well is added with Sample diluent. Solutions are added to the bottom of micro ELISA plate well, avoid inside wall touching and foaming as possible. Mix it gently. Cover the plate with sealer we provided. Incubate for 120 minutes at 37°C.
2.
Remove the liquid from each well, don't wash. Add 100µL of Detection Reagent A working solution to each well. Cover with the Plate sealer. Gently tap the plate to ensure thorough mixing. Incubate for 1 hour at 37°C. Note: if Detection Reagent A appears cloudy warm to room temperature until solution is uniform.
3.
Aspirate each well and wash, repeating the process three times. Wash by filling each well with Wash Buffer (approximately 400µL) (a squirt bottle, multi-channel pipette,manifold dispenser or automated washer are needed). Complete removal of liquid at each step is essential. After the last wash, completely remove remaining Wash Buffer by aspirating or decanting. Invert the plate and pat it against thick clean absorbent paper.
4.
Add 100µL of Detection Reagent B working solution to each well. Cover with the Plate sealer. Incubate for 60 minutes at 37°C.
5.
Repeat the wash process for five times as conducted in step 3.
6.
Add 90µL of Substrate Solution to each well. Cover with a new Plate sealer and incubate for 10-20 minutes at 37°C. Protect the plate from light. The reaction time can be shortened or extended according to the actual color change, but this should not exceed more than 30 minutes. When apparent gradient appears in standard wells, user should terminatethe reaction.
7.
Add 50µL of Stop Solution to each well. If color change does not appear uniform, gently tap the plate to ensure thorough mixing.
8.
Determine the optical density (OD value) of each well at once, using a micro-plate reader set to 450 nm. User should open the micro-plate reader in advance, preheat the instrument, and set the testing parameters.
9.
After experiment, store all reagents according to the specified storage temperature respectively until their expiry.
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.
