• Product name

    Human ICA 512 / PTPRN ELISA Kit
    See all ICA 512/PTPRN kits
  • Detection method

  • Precision

    Sample n Mean SD CV%
    Cell Extract 8 2.9%
    Sample n Mean SD CV%
    Cell Extract 3 6.6%
  • Sample type

    Cell culture extracts, Tissue, Hep Plasma, Cit plasma
  • Assay type

    Sandwich (quantitative)
  • Sensitivity

    3.52 pg/ml
  • Range

    31.25 pg/ml - 2000 pg/ml
  • Recovery

    Sample specific recovery
    Sample type Average % Range
    Cell culture extracts 92 91% - 94%
    Tissue 87 85% - 90%
    Hep Plasma 85 82% - 87%
    Cit plasma 79 76% - 82%

  • Assay time

    1h 30m
  • Assay duration

    One step assay
  • Species reactivity

    Reacts with: Human
  • Product overview

    ICA 512 / PTPRN in vitro SimpleStep ELISA® (Enzyme-Linked Immunosorbent Assay) kit is designed for the quantitative measurement of ICA 512 / PTPRN protein in Human  Citrate Plasma, Heparin Plasma, Cell and Tissue Extracts.

    The SimpleStep ELISA® employs an affinity tag labeled capture antibody and a reporter conjugated detector antibody which immunocapture the sample analyte in solution. This entire complex (capture antibody/analyte/detector antibody) is in turn immobilized via immunoaffinity of an anti-tag antibody coating the well. To perform the assay, samples or standards are added to the wells, followed by the antibody mix. After incubation, the wells are washed to remove unbound material. TMB substrate is added and during incubation is catalyzed by HRP, generating blue coloration. This reaction is then stopped by addition of Stop Solution completing any color change from blue to yellow. Signal is generated proportionally to the amount of bound analyte and the intensity is measured at 450 nm. Optionally, instead of the endpoint reading, development of TMB can be recorded kinetically at 600 nm.

    Human ICA 512 / PTPRN plays a role in vesicle-mediated secretory processes (PubMed:24843546). Required for normal accumulation of secretory vesicles in hippocampus, pituitary and pancreatic islets. ICA 512 / PTPRN is required for the accumulation of normal levels of insulin-containing vesicles and preventing their degradation (PubMed:24843546) and plays a role in insulin secretion in response to glucose stimuli. Required for normal accumulation of the neurotransmitters norepinephrine, dopamine and serotonin in the brain. In females, but not in males, required for normal accumulation and secretion of pituitary hormones, such as luteinizing hormone (LH) and follicle-stimulating hormone (FSH). Required to maintain normal levels of renin expression and renin release. ICA 512 / PTPRN appears to lack intrinsic enzyme activity but may regulate catalytic active protein-tyrosine phosphatases such as PTPRA through dimerization.


    Samples diluted in Sample Diluent NS - 3.52 pg/mL

    Samples diluted in Cell Extraction Buffer PTR - 7.30 pg/mL


  • Tested applications

    Suitable for: Sandwich ELISAmore details
  • Platform

    Pre-coated microplate (12 x 8 well strips)


  • Storage instructions

    Store at +4°C. Please refer to protocols.
  • Components 1 x 96 tests
    10X Wash Buffer PT (ab206977) 1 x 20ml
    50X Cell Extraction Enhancer Solution (ab193971) 1 x 1ml
    5X Cell Extraction Buffer PTR (ab193970) 1 x 10ml
    Antibody Diluent 4BI 1 x 6ml
    10X Human ICA 512 / PTPRN Capture Antibody 1 x 600µl
    10X Human ICA 512 / PTPRN Detector Antibody 1 x 600µl
    Human ICA 512 / PTPRN Lyophilized Recombinant Protein 2 vials
    Plate Seals 1 unit
    Sample Diluent NS (ab193972) 1 x 50ml
    SimpleStep Pre-Coated 96-Well Microplate (ab206978) 1 unit
    Stop Solution 1 x 12ml
    TMB Development Solution 1 x 12ml
  • Research areas

  • Function

    Implicated in neuroendocrine secretory processes. May be involved in processes specific for neurosecretory granules, such as their biogenesis, trafficking or regulated exocytosis or may have a general role in neuroendocrine functions. Seems to lack intrinsic enzyme activity. May play a role in the regulation of secretory granules via its interaction with SNTB2.
  • Tissue specificity

    Expression is restricted to neuroendocrine cells. Found in pancreas, brain and pituitary.
  • Sequence similarities

    Belongs to the protein-tyrosine phosphatase family. Receptor class 8 subfamily.
    Contains 1 tyrosine-protein phosphatase domain.
  • Post-translational

    Appears to undergo multiple proteolytic cleavage at consecutive basic residues.
  • Cellular localization

    Membrane. Neuroendocrine secretory granules.
  • Information by UniProt
  • Alternative names

    • CA 512
    • FLJ16131
    • IA 2
    • IA 2/PTP
    • IA2
    • IA2/PTP
    • ICA 3
    • ICA 512
    • ICA3
    • ICA512
    • Islet cell antigen 2
    • Islet cell antigen 512
    • Islet cell autoantigen 3
    • Protein tyrosine phosphatase like N
    • Protein tyrosine phosphatase like N precursor
    • Protein tyrosine phosphatase receptor type N
    • PTP IA 2
    • PTP IA-2
    • PTP IA2
    • PTPIA 2
    • PTPN
    • Ptprn
    • PTPRN protein
    • R PTP N
    • R-PTP-N
    • Receptor type tyrosine protein phosphatase like N
    • Receptor-type tyrosine-protein phosphatase-like N
    • RPTPN
    see all
  • Database links


Our Abpromise guarantee covers the use of ab226903 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
Sandwich ELISA Use at an assay dependent concentration.


  • SimpleStep ELISA technology allows the formation of the antibody-antigen complex in one single step, reducing assay time to 90 minutes. Add samples or standards and antibody mix to wells all at once, incubate, wash, and add your final substrate. See protocol for a detailed step-by-step guide.


  • Background-subtracted data values (mean +/- SD) are graphed.

  • Background-subtracted data values (mean +/- SD) are graphed.

  • The concentrations of PTPRN were measured in duplicates, interpolated from the PTPRN standard curves and corrected for sample dilution. Undiluted samples are as follows: plasma (citrate) 25%, plasma (heparin) 25%. The interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean PTPRN concentration was determined to be 874.85 pg/mL in plasma (citrate) and 819.33 pg/mL in plasma (heparin).

  • The concentrations of PTPRN were measured in duplicate and interpolated from the PTPRN standard curve and corrected for sample dilution. The interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean PTPRN concentration was determined to be 1478.61 pg/mL in SH-SY5Y extract and 489 pg/mL in human pancreas.



ab226903 has not yet been referenced specifically in any publications.

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