SKU	Name	Unit	Price	Delivery
BWS001	Recombinant Streptavidin, Wild Type	10mg	$166.6	10days
BWS002	Recombinant Streptavidin (Core), Lyophilized	10mg	$166.6	10days
BWS003	Recombinant Streptavidin (Core)	10mg	$166.6	10days
BWS004	Recombinant Streptavidin (with Cys)	10mg	$166.6	10days
BWS005	Recombinant Streptavidin (High Sensitivity)	5mg	$183.3	10days
BWS006	Recombinant Streptavidin (T-Line)	5mg	$166.6	10days
BWS007	Recombinant Streptavidin (C-Line)	5mg	$166.6	10days

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Description Operation References

Streptavidin is a tetramer composed of four identical subunits, each capable of binding one molecule of biotin. Thus, one molecule of streptavidin can bind four molecules of biotin with very high affinity (Kd ~ 10⁻¹⁵). Compared to avidin, streptavidin has a lower isoelectric point and lacks glycosylation, resulting in significantly lower non-specific binding in antigen-antibody detection systems.

Streptavidin exhibits excellent thermal stability and tolerance toward protein denaturants such as acids, urea, and SDS. These properties make the biotin-streptavidin system highly advantageous due to its strong affinity, high sensitivity, specificity, stability, and signal amplification capability. It is widely used in immunology, molecular biology, histochemistry, and related fields.

This product is produced by cloning and expressing the core functional sequence of streptavidin while retaining its binding activity. Compared to native streptavidin, it demonstrates higher specific activity per unit mass.

Source: E. coli

Features: High affinity, high purity, stable performance

BWS001 Recombinant Streptavidin, Wild Type

Molecular Weight: ~66.4 kDa (16.6 kDa/subunit)

Purity: ≥95% (SDS-PAGE)

Activity: ≥12.5 U/mg (1 U binds 1 μg biotin)

Isoelectric Point: 6.04

BWS002 Recombinant Streptavidin (Core), Lyophilized

Molecular Weight: ~53.6 kDa (13.4 kDa/subunit)

Purity: ≥95% (SDS-PAGE)

Activity: ≥16 U/mg

Isoelectric Point: 6.04

BWS003 Recombinant Streptavidin (Core)

Molecular Weight: ~53.6 kDa (13.4 kDa/subunit)

Purity: ≥95% (SDS-PAGE)

Activity: ≥16.0 U/mg

Isoelectric Point: 6.04

BWS004 Recombinant Streptavidin (with Cys)

Molecular Weight: ~54 kDa (13.5 kDa/subunit)

Purity: ≥95% (SDS-PAGE)

Activity: ≥16.0 U/mg

Isoelectric Point: 6.04

BWS005 Recombinant Streptavidin (High Sensitivity)

Purity: ≥95% (SDS-PAGE)

Activity: ≥15.0 U/mg

Isoelectric Point: 6.15

BWS006 Recombinant Streptavidin (T-Line)

Activity: ≥16.0 U/mg

BWS007 Recombinant Streptavidin (C-Line)

Activity: ≥16.0 U/mg