Lyophilized in 10mM potassium phosphate buffer pH 6.5.
Sterile Filtered White lyophilized (freeze-dried) powder.
< 10-3 U/mg protein (Azocoll, 25 oC, 24 h, pH 8.0).
Greater than 95.0% as determined by SDS-PAGE.
It is recommended to reconstitute the lyophilized Streptavidin in sterile 18MΩ-cm H2O not less than 100ug/ml, which can then be further diluted to other aqueous solutions.
> 17U/mg (one unit binds 1 ug D-biotin at pH 8.9).
Streptavidin is shipped at ambient temperature, upon arrival store at -20oC.
