Recombinant Streptavidin Catalogue Numbers: BK0163-5mg, BK0165-1000 Sizes: 5mg, 1000IU Source: Escherichia coli Molecular Weight: 13,500 Da Purity: This product is affinity purified by 2-IminoBiotin Resin (GenScrtipt，Cat. No. L00272) with the purity more than 95% and shows predominantly a single band by SDS-PAGE. Biological Activity: >15 U/mg protein, 1 U is defined as the quantity of protein that binds 1 microgramme Physical Appearance: Sterile Filtered White lyophilized (freeze-dried) powder. Formulation: AA Sequence: 0 Endotoxin: Reconstitution: Storage: The powder may be stored at 4°C for several weeks. For long-term storage, store at -20°C. Usage: This material is offered by USA Bioworld biotech for research, laboratory or further evaluation purposes. For research use only. Description: Streptavidin is a biotin-binding protein found in the culture broth of the bacterium Streptomyces avidinii. Streptavidin can bind to four moles of biotin per mole of protein,and it shows extremely high affinity, approximately 10,000-15,000 Da. Streptavidin lacks the carbohydrate side chains present on avidin and has an isoelectric point of 6.5 to avidin's 10 far closer to that at which most useful biological interactions occur. As a result, Streptavidin frequently exhibits much lower non-specific binding than avidin does.
