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Anti-Calnexin antibody - ER Marker (ab22595) is a rabbit polyclonal antibody detecting Calnexin in Western Blot, IP, ICC/IF. Suitable for Human, Mouse, Rat.



- Over 480 publications

- Trusted since 2006



Images

Immunocytochemistry/ Immunofluorescence - Anti-Calnexin antibody - ER Marker (AB22595), expandable thumbnail
  • Immunoprecipitation - Anti-Calnexin antibody - ER Marker (AB22595), expandable thumbnail
  • Western blot - Anti-Calnexin antibody - ER Marker (AB22595), expandable thumbnail
  • Western blot - Anti-Calnexin antibody - ER Marker (AB22595), expandable thumbnail
  • Immunocytochemistry/ Immunofluorescence - Anti-Calnexin antibody - ER Marker (AB22595), expandable thumbnail

Publications

Key facts

Isotype
IgG
Host species
Rabbit
Storage buffer

pH: 7.4
Preservative: 0.02% Sodium azide
Constituents: 98.98% PBS, 1% BSA

Form
Liquid
Clonality
Polyclonal

Immunogen

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

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Reactivity data

Select an application
Product promiseTestedExpectedPredictedNot recommended
IPWBICC/IF
Human
Tested
Tested
Tested
Mouse
Expected
Tested
Expected
Rat
Expected
Tested
Expected
Common marmoset
Predicted
Predicted
Predicted
Dog
Predicted
Predicted
Predicted

Tested
Tested

Species
Human
Dilution info
-
Notes

-

Expected
Expected

Species
Rat, Mouse
Dilution info
Use at an assay dependent concentration.
Notes

-

Predicted
Predicted

Species
Dog, Common marmoset
Dilution info
-
Notes

-

Tested
Tested

Species
Rat
Dilution info
1/250
Notes

-

Species
Mouse
Dilution info
1 µg/mL
Notes

-

Species
Human
Dilution info
1 µg/mL
Notes

-

Predicted
Predicted

Species
Dog, Common marmoset
Dilution info
-
Notes

-

Tested
Tested

Species
Human
Dilution info
1 µg/mL
Notes

-

Expected
Expected

Species
Rat, Mouse
Dilution info
Use at an assay dependent concentration.
Notes

-

Predicted
Predicted

Species
Dog, Common marmoset
Dilution info
-
Notes

-

Associated Products

Select an associated product type

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Target data

Function

Calcium-binding protein that interacts with newly synthesized monoglucosylated glycoproteins in the endoplasmic reticulum. It may act in assisting protein assembly and/or in the retention within the ER of unassembled protein subunits. It seems to play a major role in the quality control apparatus of the ER by the retention of incorrectly folded proteins. Associated with partial T-cell antigen receptor complexes that escape the ER of immature thymocytes, it may function as a signaling complex regulating thymocyte maturation. Additionally it may play a role in receptor-mediated endocytosis at the synapse.

Alternative names

Recommended products

Anti-Calnexin antibody - ER Marker (ab22595) is a rabbit polyclonal antibody detecting Calnexin in Western Blot, IP, ICC/IF. Suitable for Human, Mouse, Rat.



- Over 480 publications

- Trusted since 2006


Key facts

Isotype
IgG
Form
Liquid
Clonality
Polyclonal
Immunogen
  • The exact immunogen used to generate this antibody is proprietary information.
Purification technique
Affinity purification Immunogen
Specificity

Recognizes ER membrane, mitochondria and cis-Golgi

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, Store in the dark

Notes

Anti-Calnexin antibody - ER Marker (ab22595) is a rabbit polyclonal antibody and is validated for use in ICC/IF, IP, WB in human samples.

Anti-Calnexin antibody - ER Marker (ab22595) has been cited over 482 times in peer reviewed journals, has been used for calnexin staining and is trusted by the scientific community.

Abcam's high quality validation processes ensure Anti-Calnexin antibody - ER Marker (ab22595) has high sensitivity and specificity.

The specificity of Anti-Calnexin antibody - ER Marker (ab22595) has been confirmed by testing in knockout samples.

Anti-Calnexin antibody - ER Marker (ab22595) has 28 independent reviews from customers.

Anti-Calnexin antibody - ER Marker (ab22595) specifically detects Calnexin (UniProt ID: P27824; Molecular weight: 65kDa) and is sold in 100 µg selling sizes.

Calnexin, an endoplasmic reticulum (ER) chaperone protein, plays a crucial role in oncology by influencing the immune response to tumors and cancer cell behavior. It can impair antitumor immunity by inhibiting T-cell infiltration and enhancing PD-1 expression on T cells, which suppresses their activity. Additionally, aberrant O-glycosylation of calnexin is linked to increased cancer cell migration and adhesion.

Explore our range of organelle-specific antibodies and dyes and discover why our reagents are deeply trusted by cell biologists.

Supplementary info

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

Calnexin also known as Canx is a type I integral membrane protein of the endoplasmic reticulum (ER) involved in the process of protein folding. This chaperone protein has an approximate molecular weight of 90 kDa and is known for its role in the quality control of glycoproteins. Calnexin is expressed in the ER of cells where it interacts with nascent polypeptides to ensure proper folding and assembly contributing to cellular homeostasis. It exhibits its function through its lectin-like domain that binds to sugar moieties on glycoproteins.

Biological function summary

Calnexin facilitates the proper folding of newly synthesized proteins by forming a complex with another chaperone protein called ERp57. This interaction helps in creating the correct disulfide bonds in glycoproteins which is essential for their stability and functionality. The complex often referred to as the calnexin cycle is critical in preventing the aggregation and misfolding of proteins within the ER. This process ensures that only correctly folded proteins proceed to the Golgi apparatus for further processing and transport.

Pathways

Calnexin plays an important role in the ER-associated degradation (ERAD) pathway and the unfolded protein response (UPR). In these pathways calnexin ensures that misfolded proteins are retained in the ER or targeted for degradation preventing cellular stress. Calnexin is associated with proteins such as calreticulin another chaperone protein with a similar function in the ER. Together they maintain proteostasis within cells and protect against the accumulation of improperly folded proteins.

Associated diseases and disorders

Calnexin is linked to several conditions including cystic fibrosis and certain neurodegenerative diseases. In cystic fibrosis the misfolding and subsequent degradation of the CFTR protein are associated with calnexin's role in the ERAD pathway. Similarly in neurodegenerative diseases such as Alzheimer's disrupted protein folding and aggregation are linked to ER stress where calnexin and other chaperone proteins like BiP play a pivotal role in managing protein misfolding. Understanding calnexin's role in these disorders can contribute to developing strategies to mitigate faulty protein folding and its pathological consequences.

Product promise

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8 product images

  • Immunocytochemistry/ Immunofluorescence - Anti-Calnexin antibody - ER Marker (ab22595), expandable thumbnail

    Immunocytochemistry/ Immunofluorescence - Anti-Calnexin antibody - ER Marker (ab22595)

    ab22595 staining Calnexin in HeLa (Human epithelial cell line from cervix adenocarcinoma) cells.

    The cells were fixed with 100% methanol for 5 minutes, permeabilized with 0.1% Triton X-100 for 5 minutes and then blocked with 1% BSA/10% normal goat serum/0.3M glycine in 0.1% PBS-Tween for 1 hour. The cells were then incubated with ab22595 at 1 μg/ml and Anti-alpha Tubulin antibody [DM1A] - Loading Control ab7291 at 1 μg/ml overnight at +4°C, followed by a further incubation at room temperature for 1 hour with a goat secondary antibody to Rabbit IgG (Alexa Fluor® 488) (Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) preadsorbed ab150081) at 2 μg/ml (shown in green) and a goat secondary antibody to Mouse IgG (Alexa Fluor® 594) (Goat Anti-Mouse IgG H&L (Alexa Fluor® 594) preadsorbed ab150120).

    Nuclear DNA was labeled in blue with DAPI.

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

  • Immunoprecipitation - Anti-Calnexin antibody - ER Marker (ab22595), expandable thumbnail

    Immunoprecipitation - Anti-Calnexin antibody - ER Marker (ab22595)

    Calnexin was immunoprecipitated using 0.5 mg HeLa (Human epithelial cell line from cervix adenocarcinoma) whole cell extract, 5 μg of Rabbit polyclonal to Calnexin - ER membrane marker and 50 μl of protein G magnetic beads (+).

    No antibody was added to the control (-).
    The antibody was incubated under agitation with Protein G beads for 10 minutes, HeLa whole cell extract lysate diluted in RIPA buffer was added to each sample and incubated for a further 10 minutes under agitation.
    Proteins were eluted by addition of 40 μl SDS loading buffer and incubated for 10 minutes at 70oC; 10 μl of each sample was separated on a SDS PAGE gel, transferred to a nitrocellulose membrane, blocked with 5% BSA and probed with ab22595.
    Secondary: Goat polyclonal to mouse IgG light chain specific (HRP) at 1/5000 dilution.
    Band: 80kDa: Calnexin - ER membrane marker.

    All lanes: Immunoprecipitation - Anti-Calnexin antibody - ER Marker (ab22595)

    Predicted band size: 68 kDa

  • Western blot - Anti-Calnexin antibody - ER Marker (ab22595), expandable thumbnail
    Dombert et al PLoS One. 2014 Oct 22;9(10):e110846. doi: 10.1371/journal.pone.0110846. eCollection 2014. Fig 1. Reproduced under the Creative Commons license http://creativecommons.org/licenses/by/4.0/

    Western blot - Anti-Calnexin antibody - ER Marker (ab22595)

    Subcellular distribution of Smn and hnRNP R in isolated mouse embryonic motoneurons.

    Lentiviral knockdown of hnRNP R led to a dose-dependent reduction of hnRNP R levels. Calnexin and Smn protein were not altered significantly.

    Primary motoneurons or E18 spinal cord tissue, respectively, were lysed with cytosolic and nuclear fractionation buffer, solubilized in Laemmli buffer and boiled for 10 minutes at 99°C. Proteins were then subjected to SDS-PAGE, blotted onto PVDF membrane, incubated with the corresponding antibodies, including ab22595.

    All lanes: Western blot - Anti-Calnexin antibody - ER Marker (ab22595)

    Predicted band size: 68 kDa

  • Western blot - Anti-Calnexin antibody - ER Marker (ab22595), expandable thumbnail

    Western blot - Anti-Calnexin antibody - ER Marker (ab22595)

    Lane 1: Wild type HAP1 whole cell lysate (20 μg)
    Lane 2: empty lane
    Lane 3: CANX knockout HAP1 whole cell lysate (20 μg)
    Lane 4: empty lane
    Lanes 1 - 4: Merged signal (red and green). Green - ab22595 observed at 80 kDa. Red - loading control, Anti-GAPDH antibody [6C5] - Loading Control ab8245, observed at 37 kDa.

    ab22595 was shown to specifically react with CANX (Calnexin) in wildtype cells as signal was lost in CANX (Calnexin) knockout cells. Wild-type and eCANX (Calnexin) knockout samples were subjected to SDS-PAGE. ab22595 and Anti-GAPDH antibody [6C5] - Loading Control ab8245 (Mouse anti GAPDH loading control) were incubated overnight at 4°C at 1 dilution and 1/10,000 dilution respectively.

    Blots were developed with Goat anti-Rabbit IgG H&L (IRDye® 800CW) preabsorbed Goat anti-Rabbit IgG H&L (IRDye® 800CW) preadsorbed ab216773 and Goat anti-Mouse IgG H&L (IRDye® 680RD) preabsorbed Goat anti-Mouse IgG H&L (IRDye® 680RD) preadsorbed ab216776 secondary antibodies at 1/10,000 dilution for 1 hour at room temperature before imaging.

    All lanes: Western blot - Anti-Calnexin antibody - ER Marker (ab22595)

    Predicted band size: 68 kDa

    Observed band size: 80 kDa

  • Immunocytochemistry/ Immunofluorescence - Anti-Calnexin antibody - ER Marker (ab22595), expandable thumbnail

    Immunocytochemistry/ Immunofluorescence - Anti-Calnexin antibody - ER Marker (ab22595)

    ab22595 staining Calnexin in wild-type HAP1 cells (top panel) and CANX knockout HAP1 cells (bottom panel).

    The cells were fixed with 4% formaldehyde for 10 minutes, permeabilized with 0.1% Triton X-100 for 5 minutes and then blocked with 1% BSA/10% normal goat serum/0.3M glycine in 0.1% PBS-Tween for 1 hour. The cells were then incubated with ab22595 at 1 μg/ml and Alexa Fluor® 594 Anti-alpha Tubulin antibody [DM1A] - Microtubule Marker ab195889 at 1/250 dilution (shown in pseudocolour red) overnight at +4°C, followed by a further incubation at room temperature for 1 hour with a goat secondary antibody to Rabbit IgG (Alexa Fluor® 488) (Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) preadsorbed ab150081) at 2 μg/ml (shown in green).

    Nuclear DNA was labeled in blue with DAPI.

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

  • Western blot - Anti-Calnexin antibody - ER Marker (ab22595), expandable thumbnail

    Western blot - Anti-Calnexin antibody - ER Marker (ab22595)

    Lane 1: Wild-type HAP1 cell lysate (20 μg)
    Lane 2: Calnexin knockout HAP1 cell lysate (20 μg)

    Lanes 1 - 2: Merged signal (red and green). Green - ab22595 observed at 80 kDa. Red - loading control, Anti-GAPDH antibody [6C5] - Loading Control ab8245, observed at 37 kDa.

    This western blot image is a comparison between ab22595 and a competitor's top cited rabbit polyclonal antibody.

    All lanes: Western blot - Anti-Calnexin antibody - ER Marker (ab22595)

    Predicted band size: 68 kDa

  • Western blot - Anti-Calnexin antibody - ER Marker (ab22595), expandable thumbnail

    Western blot - Anti-Calnexin antibody - ER Marker (ab22595)

    All lanes: Western blot - Anti-Calnexin antibody - ER Marker (ab22595) at 1/250 dilution

    Lane 1: Western blot - NIH/3T3 whole cell lysate (NIH/3T3 whole cell lysate ab7179) at 10 µg

    Lane 2: MEF1 (Mouse embryonic fibroblast cell line) Whole Cell Lysate (ab46770) at 10 µg

    Lane 3: Brain (Mouse) Tissue Lysate (ab27253) at 10 µg

    Lane 4: Liver (Mouse) Tissue Lysate (ab7935) at 10 µg

    Lane 5: Heart (Mouse) Tissue Lysate (ab27255) at 10 µg

    Lane 6: Kidney (Mouse) Tissue Lysate (ab27254) at 10 µg

    Lane 7: Western blot - Mouse pancreas tissue lysate - total protein (Mouse pancreas tissue lysate - total protein ab29363) at 10 µg

    Lane 8: Testis (Mouse) Tissue Lysate - normal tissue (ab4027) at 10 µg

    Lane 9: Western blot - Mouse skeletal muscle tissue lysate - total protein (Mouse skeletal muscle tissue lysate - total protein ab29711) at 10 µg

    Lane 10: Spinal Cord (Mouse) Tissue Lysate (ab50253) at 10 µg

    Lane 11: Ovary (Mouse) Tissue Lysate (ab35808) at 10 µg

    Lane 12: PC-12 (Rat adrenal pheochromocytoma cell line) Whole Cell Lysate (ab50957) at 10 µg

    Lane 13: Brain (Rat) Tissue Lysate (ab7942) at 10 µg

    Lane 14: Liver (Rat) Tissue Lysate (ab27256) at 10 µg

    Lane 15: Heart (Rat) Tissue Lysate (ab7940) at 10 µg

    Lane 16: Kidney (Rat) Whole Cell Lysate - normal tissue (ab29480) at 10 µg

    Secondary

    All lanes: IRDye 680 Conjugated Goat Anti-Rabbit IgG (H+L) at 1/10000 dilution

    Performed under reducing conditions.

    Predicted band size: 68 kDa

    Observed band size: 80 kDa

  • Western blot - Anti-Calnexin antibody - ER Marker (ab22595), expandable thumbnail

    Western blot - Anti-Calnexin antibody - ER Marker (ab22595)

    Recent batches of ab22595 (AP217379 and AP151845) detect a band of ~ 75 kDa in HeLa, U-2 OS and MCF7 lysates. This band is completely blocked by the immunizing peptide so we believe this represents Calnexin. Moreoever, a band of the same size is detected by other Calnexin antibodies tested.

    All lanes: Western blot - Anti-Calnexin antibody - ER Marker (ab22595) at 1 µg/mL

    Lane 1: HeLa (Human epithelial carcinoma cell line) whole cell lysate at 20 µg

    Lane 2: U-2 OS (Human bone osteosarcoma epithelial cell line) whole cell lysate at 20 µg

    Lane 3: MCF7 (Human breast adenocarcinoma cell line) whole cell lysate at 20 µg

    Lane 4: HeLa whole cell lysate at 20 µg

    Lane 5: U-2 OS whole cell lysate at 20 µg

    Lane 6: MCF7 whole cell lysate at 20 µg

    Secondary

    All lanes: Goat polyclonal to Rabbit IgG (Alexa Fluor® 680) at 1/10000 dilution

    Performed under reducing conditions.

    Predicted band size: 68 kDa

    Observed band size: 75 kDa

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