Chromogranin A Antibody

• Catalog Number: orb606571
• Category: Antibodies
• Description: Chromogranin A is present in neuroendocrine cells throughout the body, including the neuroendocrine cells of the large and small intestine, adrenal medulla and pancreatic islets. It is an excellent marker for carcinoid tumors, pheochromocytomas, paragangliomas, and other neuroendocrine tumors. Co-expression of chromogranin A and neuron specific enolase (NSE) is common in neuroendocrine neoplasms. Reportedly, co-expression of certain keratins and chromogranin indicates neuroendocrine lineage. The presence of strong anti-chromogranin staining and absence of anti-keratin staining should raise the possibility of paraganglioma. The co-expression of chromogranin and NSE is typical of neuroendocrine neoplasms. Most pituitary adenomas and prolactinomas readily express chromogranin.
• Species/Host: Rabbit
• Clonality: Recombinant
• Clone Number: CHGA/1731R
• Tested applications: IHC-P
• Reactivity: Human
• Isotype: Rabbit IgG, kappa
• Immunogen: Recombinant human protein was used as the immunogen for the recombinant Chromogranin A antibody.
• Dilution range: Immunohistochemistry (FFPE): 0.5-1ug/ml for 30 min at RT
• Purity: Protein A affinity chromatography
• Conjugation: Unconjugated
• Formula: 0.2 mg/ml in 1X PBS with 0.1 mg/ml BSA (US sourced) and 0.05% sodium azide
• Hazard Information: This recombinant Chromogranin A antibody is available for research use only.
• UniProt ID: P10645
• Storage: Store the recombinant Chromogranin A antibody at 2-8°C (with azide) or aliquot and store at -20°C or colder (without azide).
• Buffer/Preservatives: 0.2 mg/ml in 1X PBS with 0.1 mg/ml rAlbumin (US sourced) and 0.05% sodium azide
• Note: For research use only
• Application notes: Optimal dilution of the recombinant Chromogranin A antibody should be determined by the researcher.1. The prediluted format is supplied in a dropper bottle and is optimized for use in IHC. After epitope retrieval step (if required), drip mAb solution onto the tissue section and incubate at RT for 30 min.
• Expiration Date: 12 months from date of receipt.

IHC analysis of FFPE human pancreas stained with recombinant Chromogranin A antibody (CHGA/1731R). Required HIER: steam sections in pH6 citrate buffer for 10-20 min.

IHC analysis of FFPE human parathyroid gland stained with recombinant Chromogranin A antibody (CHGA/1731R). Required HIER: steam sections in pH6 citrate buffer for 10-20 min.

SDS-PAGE analysis of purified, BSA-free recombinant Chromogranin A antibody (clone CHGA/1731R) as confirmation of integrity and purity.

Analysis of HuProt (TM) microarray containing more than 19, 000 full-length human proteins using Chromogranin A antibody (clone CHGA/1731R). These results demonstrate the foremost specificity of the CHGA/1731R mAb. Z- and S- score: The Z-score represents the strength of a signal that an antibody (in combination with a fluorescently-tagged anti-IgG secondary Ab) produces when binding to a particular protein on the HuProt (TM) array. Z-scores are described in units of standard deviations (SD's) above the mean value of all signals generated on that array. If the targets on the HuProt (TM) are arranged in descending order of the Z-score, the S-score is the difference (also in units of SD's) between the Z-scores. The S-score therefore represents the relative target specificity of an Ab to its intended target.