Magnetic Beads

Our magnetic beads include silica-modified, carboxy-terminated and DEAE magnetic beads which are weak anion exchange super paramagnetic beads.  The beads are uniform 1 µm diameter beads at a concentration of approximately 1.7 x 108 beads /mg.  The surface area is roughly 100 m2/g and magnetization is about 40 EMU/g.  Silica-modified magnetic beads are coated with silica and be further modified to carry different functional groups for other applications, or used for DNA and RNA purifications.  Carboxy-terminated magnetic beads are coated with high density carboxyl functional groups on the surface.  The beads are used to covalently conjugate primary amine containing ligands via stable amide bonds.  Carboxy-terminated magnetic beads are most suitable for conjugation of large proteins.  Carboxy-terminated magnetic beads are also used for nucleic acid isolation in the presence of polyethylene glycol and sodium chloride.  DEAE magnetic beads are designed for quick fractionation of nucleic acids, proteins/peptides from complex biological samples such as serum, plasma, soils, fecal and plant samples.

Silica Modified Magnetic Beads
Silica-modified magnetic beads are uniform, superparamagnetic beads coated with silica. The beads can be further modified to carry different functional groups for other applications or used for DNA and RNA purifications.

Bead size                                           1 µm diameter
Number of Beads                             ∼ 1.0 x 108 beads/mg
Magnetic core                                   Fe3O4
Shell                                                    Silica
Surface area                                      ∼ 25.36 m
2/g

Saturation Magnetization              53.51 EMU/g
Type of Magnetization                    Superparamagnetic
Stability                                              pH 4 – 10
Temperature:                                    4°C to 140°C
Most Organic Solvents
Recommended concentration        40 mg/ml in distilled water
Storage                                                 Store at 4°C upon receipt

 

Catalog # Size Price
MB-01-50 50 mg $ 45.00
MB-01-100 100 mg $ 90.00

Carboxy-terminated Magnetic Beads
Carboxy-terminated magnetic beads are uniform, silica-based superparamagnetic beads coated with high density carboxyl functional groups on the surface. The beads are used to covalently conjugate primary amine containing ligands via stable amide bond. Carboxy-terminated magnetic beads are most suitable for conjugation of large proteins. Long-arm carboxy-terminated magnetic beads are recommended for conjugation of small peptides because the long-arm (21-atom) hydrophilic linker may reduce steric hindrance. Carboxy-terminated magnetic beads are also used for nucleic acid isolation in the presence of polyethylene glycol and sodium chloride.

Bead size                                           1 µm diameter
Number of Beads                             ∼ 1 x 108 beads/mg
Surface area                                      ∼ 250µM/g
Magnetization                                    ∼ 45.27 EMU/g
Type of Magnetization                      Superparamagnetic
Stability                                                pH 4 – 10
Temperature:                                      4°C to 140°C
Solvents                                               Most Organic Solvents
Formulation                                        Suspension in 20% ethanol
Functional Group Density                 ∼ 250 µmole/g of Beads
Storage                                                  Store at 4°C to 8°C upon receipt

 

Catalog # Size Price
MB-02-50 50 mg $ 112.00
MB-02-100 100 mg $ 220.00

DEAE Magnetic Beads
DEAE magnetic beads are uniform, weak anion exchange superparamagnetic beads. The beads are specially designed for quick fractionation of nucleic acids, proteins/peptides from complex biological samples (such serum, plasma, soils, fecal and plant samples) manually or through automated protocols.

Bead size                                           1 µm diameter
Number of Beads                             ∼ 1.7 x 108 beads/mg
Surface area                                     ∼ 100 m2 /g
Magnetization                                 ∼ 40
 EMU/g
Type of Magnetization                    Superparamagnetic

Protein Binding Capacity              ≥ 50 mg BSA/mg of beads
Effective Density                             2.5 g/ml
Storage Temperature                     4°C upon receipt
Concentration                                  50 mg/ml (20% Ethanol)

 

Catalog # Size Price
MB-03-50 50 mg $ 66.00
MB-03-100 100 mg $ 130.00