General Information 

Species:Streptomyces 

Host:N/A AA 

Seq:25-183/183

Predicted MW:12 

Detected MW:12/38/55 kDa 

Tags:Tag free

QC Testing 

Activity:Yes 

Endotoxin:Not analyzed 

Purity:>95% as determined by SDS-PAGE 

Purification:AC 

Concentration:＞0.5 mg/ml

Background:Streptavidin is a tetrameric protein composed of identic subunits. Each subunit binds one  biotin molecule with a KD of ~1x10-15M. The preparation contains an N- and C-terminal shortened variant  (core streptavidin) with improved properties concerning homogeneity, solubility, resistance towards  proteolytic degradation and accessibility of the biotin binding pocket as compared to native streptavidin. The  high affinity recognition of biotin and biotinylated molecules has made streptavidin one of the most important  components in diagnostics and laboratory kits.