Validated using a knockout cell line

Recombinant Anti-Cystathionase/CTH antibody [EPR15468] - N-terminal (ab189916)


  • Product name

    Anti-Cystathionase/CTH antibody [EPR15468] - N-terminal
    See all Cystathionase/CTH primary antibodies
  • Description

    Rabbit monoclonal [EPR15468] to Cystathionase/CTH - N-terminal
  • Host species

  • Tested applications

    Suitable for: WB, IPmore details
  • Species reactivity

    Reacts with: Human
  • Immunogen

    Synthetic peptide within Human Cystathionase/CTH aa 1-100 (N terminal). The exact sequence is proprietary.
    Database link: P32929

  • Positive control

    • HeLa and K562 cell lysates.
  • General notes



     This product was previously labelled as Cystathionase


    Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMab® patents.

    This product is a recombinant rabbit monoclonal antibody.



Our Abpromise guarantee covers the use of ab189916 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
WB 1/10000 - 1/50000. Detects a band of approximately 45 kDa (predicted molecular weight: 45 kDa).
IP 1/50 - 1/70.


  • Function

    Catalyzes the last step in the transsulfuration pathway from methionine to cysteine. Has broad substrate specificity. Converts cystathionine to cysteine, ammonia and 2-oxobutanoate. Converts two cysteine molecules to lanthionine and hydrogen sulfide. Can also accept homocysteine as substrate. Specificity depends on the levels of the endogenous substrates. Generates the endogenous signaling molecule hydrogen sulfide (H2S), and so contributes to the regulation of blood pressure.
  • Pathway

    Amino-acid biosynthesis; L-cysteine biosynthesis; L-cysteine from L-homocysteine and L-serine: step 2/2.
  • Involvement in disease

    Defects in CTH are the cause of cystathioninuria (CSTNU) [MIM:219500]. It is an autosomal recessive phenotype characterized by abnormal accumulation of plasma cystathionine, leading to increased urinary excretion.
  • Sequence similarities

    Belongs to the trans-sulfuration enzymes family.
  • Post-translational

    Phosphorylated upon DNA damage, probably by ATM or ATR.
  • Cellular localization

  • Information by UniProt
  • Database links

  • Alternative names

    • CGL_HUMAN antibody
    • CTH antibody
    • cystathionase (cystathionine gamma-lyase) antibody
    • Cystathionine gamma lyase antibody
    • Cystathionine gamma-lyase antibody
    • Cysteine desulfhydrase antibody
    • Gamma cystathionase antibody
    • Gamma-cystathionase antibody
    • Homoserine deaminase antibody
    • Homoserine dehydratase antibody
    • MGC9471 antibody
    see all


  • Lane 1: Wild type HAP1 whole cell lysate (20 µg)
    Lane 2: Cystathionase/CTH knockout HAP1 whole cell lysate (20 µg)
    Lane 3: HeLa whole cell lysate (20 µg)
    Lane 4: K562 whole cell lysate (20 µg)

    Lanes 1 - 4: Merged signal (red and green). Green - ab189916 observed at 45 kDa. Red - loading control, ab130007, observed at 130 kDa.

    ab189916 was shown to recognize Cystathionase/CTH in wild type cells as signal was lost at the expected MW in Cystathionase/CTH knockout cells. Additional cross-reactive bands were observed in the wild-type and knockout cells. Wild-type and Cystathionase/CTH knockout samples were subjected to SDS-PAGE. Ab189916 and ab130007 (Mouse anti-Vinculin loading control) were incubated overnight at 4°C at 1/10000 dilution and 1/20000 dilution respectively. Blots were developed with Goat anti-Rabbit IgG H&L (IRDye® 800CW) preabsorbed ab216773 and Goat anti-Mouse IgG H&L (IRDye® 680RD) preabsorbed ab216776 secondary antibodies at 1/20000 dilution for 1 hour at room temperature before imaging.

  • Anti-Cystathionase/CTH antibody [EPR15468] - N-terminal (ab189916) at 0.01 µg/ml + HeLa (Human cervix adenocarcinoma epithelial cell) whole cell lysate at 20 µg

    Goat Anti-Rabbit IgG (HRP), specific to the non-reduced form of IgG at 1/20000 dilution

    Predicted band size: 45 kDa

    Exposure time: 1 minute

    Blocking and diluting buffer: 5% NFDM/TBST.

  • Immunoprecipitation of Cystathionase/CTH from HeLa cell lysate using ab189916 at 1/50 or 1X PBS (negative control) (lane 1). Immunostained with ab189916 at 1/1500 and HRP-conjugated anti-rabbit IgG preferentially detecting the non-reduced form of rabbit IgG.


ab189916 has not yet been referenced specifically in any publications.

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