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Human Recombinant Monoclonal CD74 antibody. Suitable for ICC/IF, IHC-P and reacts with Mouse samples.

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Images

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD74 antibody [EPR25399-94] – Human IgG (Chimeric) (AB323245), expandable thumbnail
  • Immunocytochemistry/ Immunofluorescence - Anti-CD74 antibody [EPR25399-94] – Human IgG (Chimeric) (AB323245), expandable thumbnail

Key facts

Isotype

IgG

Host species

Human

Storage buffer

pH: 7.2 - 7.4
Preservative: 0.01% Sodium azide
Constituents: 59% PBS, 40% Glycerol (glycerin, glycerine), 0.05% BSA

Form

Liquid

Clonality

Monoclonal

Immunogen

  • The exact immunogen used to generate this antibody is proprietary information.

Reactivity data

Select an application
Product promiseTestedExpectedPredictedNot recommended
ICC/IFIHC-P
Mouse
Tested
Tested

Tested
Tested

Species

Mouse

Dilution info

1/100

Notes

-

Tested
Tested

Species

Mouse

Dilution info

1/100

Notes

Perform heat-mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol.

Target data

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. Enhance also the stimulation of T-cell responses through interaction with CD44.Isoform LongStabilizes the conformation of mature CTSL by binding to its active site and serving as a chaperone to help maintain a pool of mature enzyme in endocytic compartments and extracellular space of antigen-presenting cells (APCs).Class-II-associated invariant chain peptideBinds to the peptide-binding site of MHC class II alpha/beta heterodimers forming an alpha-beta-CLIP complex, thereby preventing the loading of antigenic peptides to the MHC class II complex until its release by HLA-DM in the endosome.

Alternative names

Ii, Cd74, Ii, H-2 class II histocompatibility antigen gamma chain, Ia antigen-associated invariant chain, MHC class II-associated invariant chain, Ii, Ii chain

Human Recombinant Monoclonal CD74 antibody. Suitable for ICC/IF, IHC-P and reacts with Mouse samples.

Key facts

Isotype

IgG

Form

Liquid

Clonality

Monoclonal

Immunogen
  • The exact immunogen used to generate this antibody is proprietary information.
Clone number

EPR25399-94

Purification technique

Affinity purification Protein A

Concentration
Loading...

Storage

Shipped at conditions

Blue Ice

Appropriate short-term storage duration

1-2 weeks

Appropriate short-term storage conditions

+4°C

Appropriate long-term storage conditions

-20°C

Aliquoting information

Upon delivery aliquot

Storage information

Avoid freeze / thaw cycle

Notes

This human monoclonal chimeric antibody has been engineered from a RabMAb parent antibody (Anti-CD74 antibody [EPR25399-94] ab289885). By necessity, some rabbit sequence is retained as part of the variable domain. When multiplexing with other rabbit-derived antibodies, using cross absorbed Fc-reactive secondary antibodies are recommended.

This product is a recombinant monoclonal antibody, which offers several advantages including:

  • - High batch-to-batch consistency and reproducibility
  • - Improved sensitivity and specificity
  • - Long-term security of supply
  • - Animal-free batch production

For more information, read more on recombinant antibodies.

Supplementary info

This supplementary information is collated from multiple sources and compiled automatically.

Activity summary

CD74 also known as the invariant chain or li is a protein with a mass of about 33 kDa. It is widely expressed on the surface of immune cells such as B cells dendritic cells and macrophages. CD74 plays an important role in the immune system by acting as a chaperone for major histocompatibility complex class II (MHC II) molecules guiding their migration to endosomes where they encounter antigenic peptides. The CD74 protein also functions as a cell surface receptor for macrophage migration inhibitory factor (MIF) enhancing the immune response process.

Biological function summary

CD74 facilitates multiple immune regulatory processes. It forms a complex with the MHC II molecules aiding in their proper folding and peptide loading in the endoplasmic reticulum. This complex then travels through the Golgi apparatus towards the lysosomal compartments where antigens are presented to initiate adaptive immune responses. In addition CD74 is involved in signal transduction pathways that regulate cell proliferation and survival influenced by interactions with MIF and other molecules.

Pathways

The role of CD74 extends into both the antigen presentation and MIF signaling pathways. Within the antigen presentation pathway CD74's activity is tightly connected with MHC II and subsequently to CD4+ T cells facilitating the activation of these immune cells. The MIF signaling pathway involves CD74 interacting with CD44 a receptor that further propagates the signaling cascades essential for immune modulation and cell survival.

Associated diseases and disorders

CD74 is linked to inflammatory and autoimmune conditions such as rheumatoid arthritis and systemic lupus erythematosus. Aberrant expression of CD74 influences the presentation of autoantigens and may contribute to the chronic inflammation seen in these disorders. Its connection to MIF which is a pro-inflammatory cytokine further implicates CD74 in these autoimmune scenarios by promoting persistent immune activation. Researchers are also exploring CD74 as a therapeutic target in certain cancers due to its influence on immune surveillance and tumor progression.

Product promise

We are dedicated to supporting your work with high quality reagents and we are here for you every step of the way should you need us.

In the unlikely event of one of our products not working as expected, you are covered by our product promise.

Full details and terms and conditions can be found here:
Terms & Conditions.

2 product images

  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD74 antibody [EPR25399-94] – Human IgG (Chimeric) (ab323245), expandable thumbnail

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD74 antibody [EPR25399-94] – Human IgG (Chimeric) (ab323245)

    Immunofluorescence staining of CD74 in sections of formalin-fixed paraffin-embedded mouse spleen (positive) and mouse kidney (negative).

    Performed on a Leica BOND. The section was pre-treated using heat mediated antigen retrieval with sodium citrate (pH6.0) for 20 minutes. The section was then incubated at room temperature for 1 hour with ab323245 at 1/100 dilution and then incubated for 1 hour with Rabbit monoclonal [H26-10] Anti-Human IgG1 H&L (Alexa Fluor® 488) ab200622 Rabbit monoclonal [H26-10] Anti-Human IgG1 H&L (Alexa Fluor® 488) at 1/1000 dilution (shown in green). Nuclear DNA was labelled with DAPI (shown in blue). The section was then mounted using Dako Fluorescence Mounting Medium®.

    Image was taken with a confocal microscope (Leica-Microsystems, TCS SP8).

    For other IHC staining systems (automated and non-automated), customers should optimize variable parameters such as antigen retrieval conditions, antibody concentrations and incubation times.

  • Immunocytochemistry/ Immunofluorescence - Anti-CD74 antibody [EPR25399-94] – Human IgG (Chimeric) (ab323245), expandable thumbnail

    Immunocytochemistry/ Immunofluorescence - Anti-CD74 antibody [EPR25399-94] – Human IgG (Chimeric) (ab323245)

    ab323245 staining CD74 in Raw264.7 (positive) and Neuro-2a (negative) cells. The cells were fixed with 100% methanol (5 min), permeabilized with 0.1% PBS-Triton X-100 for 5 minutes and then blocked with 1% BSA/10% normal rabbit serum/0.3M glycine in 0.1%PBS-Tween for 1h. The cells were then incubated overnight at 4° C with ab323245 at 5ug/ml (shown in green) and Alexa Fluor® 594 Anti-alpha Tubulin antibody [EP1332Y] - Microtubule Marker ab202272, Alexa Fluor® 594 Rabbit monoclonal [EP1332Y] to alpha Tubulin - Microtubule Marker (shown in pseudocolour magenta). Cells were then incubated with Rabbit monoclonal [H26-10] Anti-Human IgG1 H&L (Alexa Fluor® 488) ab200622 Rabbit monoclonal [H26-10] Anti-Human IgG1 H&L (Alexa Fluor® 488) at 1/1000 dilution. Nuclear DNA was labelled with DAPI (shown in blue). Image was acquired with a high-content analyser (Operetta CLS, Perkin Elmer) and a maximum intensity projection of confocal sections is shown.

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Product protocols

For this product, it's our understanding that no specific protocols are required. You can:

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