MagnaLink® 2.8 µm Streptavidin Magnetic Beads offer the highest biotin binding capacity on the market, combined with exceptional size uniformity. Higher binding translates to reduced bead mass required to immobilize a biotinylated sample and lower background from nonspecific binding, resulting in better signals and lower costs. MagnaLink® Streptavidin Magnetic Beads are 2.8 micron diameter, super-paramagnetic, hydrophilic polymer–encapsulated (no exposed iron), monodispersed microspheres with a uniform size distribution and a fast (<2 min) magnetic response time. They are colloidally stable with or without non-ionic detergents. The key to high biotin binding is in the unique covalently crosslinked streptavidin, based on Chromalink® technology. The high surface area, when combined with our efficient linking chemistry, produces a consistent product with a free biotin binding capacity of at least 12 nmol per milligram of beads. MagnaLink® beads also demonstrate exceptional size uniformity of <5% CV, as evidenced by scanning electron microscopy (SEM). These combined technologies make MagnaLink® beads the ideal magnetic bead for high-throughput robotic applications.
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