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Clostridium difficile Toxin A Monoclonal Mouse Antibody (253/422)

Product Attributes

Antibody number


Antibody reactivity (target)

Clostridium difficile Toxin A

Antibody type


Host species







IgG1, kappa

Molecular weight

308 kDa (Toxin A)


Clostridium difficile; C. difficile; tcdA; toxA

Human gene symbol

Not Applicable

Entrez gene ID

Not Applicable




Not Applicable


C. difficile Toxin A

Antibody target cellular localization

Secreted (extracellular)

Species reactivity

Clostridium difficile

Antibody application notes

For coating for ELISA, order Ab without BSA, Higher concentration may be required for direct detection using primary antibody conjugates than for indirect detection with secondary antibody, Optimal dilution and staining procedure for a specific application should be determined by user, Recommended starting concentrations for titration are 1-2 ug/mL for most applications, or 1 ug/million cells/100 uL for flow cytometry

Positive control

Clostridium difficile extract or infected cells. Tissue.

Shipping condition

Room temperature

Storage Conditions

Store at 2 to 8 °C, Protect fluorescent conjugates from light, Note: store BSA-free antibodies at -10 to -35 °C

Regulatory status

For research use only (RUO)

Antibody/conjugate formulation

Conjugates: 0.1 mg/mL in PBS/0.1% BSA/0.05% azide, HRP conjugates: 0.1 mg/mL in PBS/0.05% BSA, Purified: 0.2 mg/mL in PBS/0.05% BSA/0.05% azide, Purified, BSA-free: 1 mg/mL in PBS without azide

Shelf life

Guaranteed for at least 24 months from date of receipt when stored as recommended

Note: Please be advised that primary antibodies with catalog numbers that begin with “BN” will only be offered conjugated to CF®405S, CF®488A, CF®568, CF®594, CF®640R, CF®647, and biotin as of 5/27/2022. However, previously available primary antibody conjugates that are in stock will remain available until inventory is exhausted. Please view the list of available conjugates on the product page. We also recommend our easy-to-use Mix-n-Stain™ Antibody Labeling Kits for labeling antibodies with all CF® Dyes, fluorescent proteins, tandem dyes, and enzyme reporters. We apologize for the inconvenience.
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Product Description

This MAb reacts with C. difficile Toxin A, but not with Cholera subunit a, Cholera toxin, Pseudomonas aeruginosa exotoxin A, H-LT, P-LT. Clostridium difficile is a major nosocomial pathogen that causes antibiotic- associated colitis. Clostridium difficile mediates inflammatory diarrhea by releasing two large protein enterotoxins (Toxin A and Toxin B) that are able to disrupt intestinal epithelial cells via their transferase activity and ability to monoglucosylate members of the Rho family. Clostridium difficile Toxin A is a toxin that is composed of 39 repeats that are responsible for binding to intestinal epithelial cell surface carbohydrates. Clostridium difficile Toxin A causes significant apoptosis of colonocytes which contributes to the formation of ulcers and pseudo-membranes in a pathway that involves p38-dependent activation of p53 and induction of p21, leading to cytochrome c release and caspase-3 activation through Bak activation.

Primary antibodies are available purified, or with a selection of fluorescent CF® dyes and other labels. CF® dyes offer exceptional brightness and photostability. See the CF® Dye Brochure for more information. Note: Conjugates of blue fluorescent dyes like CF®405S and CF®405M are not recommended for detecting low abundance targets, because blue dyes have lower fluorescence and can give higher non-specific background than other dye colors.

Stock status: Because Biotium offers a large number of antibody and conjugation options, primary antibody conjugates may be made to order. Typical lead times are up to one week for CF® dye and biotin conjugates, and up to 2-3 weeks for fluorescent protein and enzyme conjugates. Please email to inquire about stock status and lead times before placing your order.

Catalog Number Key for Primary Antibody Conjugates

Antibody # prefixConjugationEx/Em (nm)Laser lineDetection channelDye Features
BNC04CF®405S404/431405DAPI (microscopy), AF405CF®405S Features
BNC88CF®488A490/515488GFP, FITCCF®488A Features
BNC68CF®568562/583532, 561RFP, TRITCCF®568 Features
BNC94CF®594593/614561Texas Red®CF®594 Features
BNC40CF®640R642/662633-640Cy®5CF®640R Features
BNC47CF®647650/665633-640Cy®5CF®647 Features
Alexa Fluor, Pacific Blue, Pacific Orange, and Texas Red are trademarks or registered trademarks of Thermo Fisher Scientific; Cy is a registered trademark of GE Healthcare; IRDye, LI-COR, and Odyssey are registered trademarks of LI-COR Bioscience.

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