Agarose beads consist of small spherical particles of agarose which are different in diameters and concentrations and are widely used for size exclusion or affinity chromatography. Standard, cross-linked and highly cross-linked agarose beads (without ligand linking) are used in Gel Filtration Chromatography (or size Exclusion Chromatography), while, for affinity chromatography, ligands such as nitrilotriacetic acid (NTA) or iminodiacetic acid (IDA) are covalently linked to the agarose bead polymer which can be further used for separation of tagged proteins from other proteins. For decades, Agarose beads have been used for protein purification. Physical characteristics of agarose beads significantly vary between different kinds of beads and result in their different applications. Standard agarose beads (not cross-linked) are used for separation techniques whereby gravity force runs the samples through the agarose matrix. However, for high-pressure separation techniques, highly cross-linked and cross-linked beads must be chosen. Highly cross-linked and cross-linked beads are physically and chemically more stable than the standard agarose beads, hence, the higher the level of cross-linking is the more stable the matrix are. To produce Highly cross-linked and cross-linked beads, agarose beads must be treated with a particular reagent.
Streptavidin Agarose Resin consists of highly cross-linked agarose beads with size of 50-150 µm which covalently linked to Recombinant streptavidin (a tetrameric protein containing four biotin-binding sites) with free biotin binding capacity of >120 nmol/ml. This resin is used for affinity chromatography purifications of biotinylated proteins from non-biotinylated proteins, including but not limited to affinity purification of antigens when used with biotinylated antibodies.
Catalog Number: ZXB-06-162
Bead Geometry & Size: Spherical ~50-150 µm
Agarose %: 6%
Free Biotin Binding Capacity: > 120 nmol/ml gel
Antimicrobial Agent: 20% Ethanol
Storage Temperature: 4˚C