Anti-Human A33 Recombinant Antibody (KRN330) (CAT#: TAB-002CL)

Recombinant Human monoclonal antibody expressed in CHO binding to Human A33. KRN330 is a recombinant, fully-human monoclonal antibody directed against A33, a surface differentiation antigen on normal colonic epithelium, which is uniformly expressed in 95% of colorectal cancers.

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Figure 1 Immunohistochemistry staining of biopsy samples.

Figure 1 Immunohistochemistry staining of biopsy samples.

Positive staining was observed for both A33 expression and KRN330 binding from patients biopsied on Day 8, 9 or 14 following initial dosing of 3 mg/kg. Although
one of the specimens was obtained by fine needle aspiration, as opposed to core biopsy, positive staining for A33 expression was observed on the membrane of tumour cells. Control tissue from cynomolgus monkeys and commercially available human CRC tissue demonstrated positive binding for A33 and binding of KRN330 only in tissue from animals exposed to KRN330.

Infante, J. R., Bendell, J. C., Goff, L. W., Jones, S. F., Chan, E., Sudo, T., ... & Berlin, J. D. (2013). Safety, pharmacokinetics and pharmacodynamics of the anti-A33 fully-human monoclonal antibody, KRN330, in patients with advanced colorectal cancer. European Journal of Cancer, 49(6), 1169-1175.


  • Host Species
  • Human
  • Derivation
  • Human
  • Type
  • Antibody
  • Species Reactivity
  • Human
  • Applications
  • IHC
  • Related Disease
  • Cancer; Colorectal Cancer

Product Property

  • Purity
  • >98% by SDS-PAGE and HPLC analysis
  • Storage
  • 4°C or -20°C, avoid repeated freezing and thawing.


  • Application Notes
  • This antibody has been reported for use in Immunohistochemistry.


  • Alternative Names
  • A33; glycoprotein A33 (transmembrane); GPA3

Product Notes

This is a product of Creative Biolabs' Hi-Affi™ recombinant antibody portfolio, which has several benefits including:

• Increased sensitivity
• Confirmed specificity
• High repeatability
• Excellent batch-to-batch consistency
• Sustainable supply
• Animal-free production

See more details about Hi-Affi™ recombinant antibody benefits.


Download resources about recombinant antibody development and antibody engineering to boost your research.

See other products for "A33"

Humanized Antibody

CAT Product Name Application Type
TAB-0620CLV Anti-Human A33 Recombinant Antibody (A) FC, IF Humanized antibody

Recombinant Antibody

CAT Product Name Application Type
HPAB-0127-FY Human Anti-A33 Recombinant Antibody (HPAB-0127-FY) ELISA, Neut, FuncS Human IgG

scFv Fragment Antibody

Fab Fragment Antibody

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For Research Use Only. Not For Clinical Use.

For research use only. Not intended for any clinical use. No products from Creative Biolabs may be resold, modified for resale or used to manufacture commercial products without prior written approval from Creative Biolabs.

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