Description

Variant-Specific Surface Protein, Giardia is a highly purified recombinant protein derived from the surface antigen of the *Giardia lamblia* parasite. This protein is critical for research and development in the fields of parasitology, immunology, and diagnostic assay manufacturing. It serves as a key reagent for scientists and manufacturers developing vaccines, therapeutic antibodies, and sensitive diagnostic tests for giardiasis. The product is essential for academic research institutions, biotechnology companies, and in vitro diagnostic (IVD) kit producers focused on combating this widespread waterborne pathogen.

Application

• Diagnostic Assay Development: As a critical antigen for the development and calibration of ELISA, lateral flow, and other immunoassays for detecting *Giardia* infection.
• Vaccine Research: Used as an immunogen in preclinical studies to evaluate vaccine candidates and understand protective immune responses against giardiasis.
• Antibody Production & Characterization: Serves as the target antigen for generating and screening monoclonal or polyclonal antibodies with high specificity.
• Immunological Studies: Facilitates research into host-parasite interactions, antigenic variation, and the molecular mechanisms of *Giardia*.
• Quality Control Reference Standard: Acts as a positive control and calibration standard in the quality control of commercial diagnostic kits.
• Educational & Research Kits: Incorporated into teaching kits for university-level microbiology and immunology courses.

Basic Information

Product Name	Variant-Specific Surface Protein, Giardia
CAS No.	145169-55-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Giardia VSP; Variant-specific Surface Protein Antigen; Giardia lamblia Surface Antigen; Giardia Surface Protein (GSP); Recombinant Giardia Antigen; Cysteine-rich Surface Protein; Giardia Diagnostic Antigen; TSA 417 (homolog)
EINECS	Contact for details

Quality Control

Our Variant-Specific Surface Protein, Giardia is produced under stringent conditions to ensure batch-to-batch consistency and high biological activity. Each lot undergoes comprehensive analytical testing, including purity assessment by SDS-PAGE and HPLC, identity confirmation via Western Blot or mass spectrometry, and functionality testing in immunoassays. Certificates of Analysis (COA) detailing purity, endotoxin levels, and biological activity are provided with every shipment to support your research and regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. For long-term stability, store lyophilized material at -20°C or below. Upon reconstitution, aliquot to avoid repeated freeze-thaw cycles and store at -70°C or lower. The product is hygroscopic (moisture-sensitive); ensure the vial is at room temperature before opening to prevent condensation.

Specification

Item	Specification
Appearance	White to off-white lyophilized powder
Identification (Western Blot)	Consistent with Giardia VSP
Purity (SDS-PAGE)	≥ 90%
Protein Content (BCA)	≥ 95% of stated weight
Endotoxin Level (LAL)	< 1.0 EU/µg
Biological Activity (ELISA)	Reactive with standard anti-Giardia antisera
Solubility	Soluble in PBS or appropriate aqueous buffer

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.