Recombinant Core Streptavidin 2 (r-cSA2)

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SKU:: GEN-NRPA18S
UPC:
MPN:
Formulation:: Lyophilized from 5mM PB (4mM Na2HPO4, 1mM NaH2PO4, pH7.4)
Mol. Wt .:: 13.3 kDa subunit; Tetramer 53.2 kDa
Theory pI:: 6.09
Theoretical activity:: 18.3 protein u / mg (r-cSA2: Biotin = 1: 4 (mol: mol))
Resources:: Escherichia coli (E. coli)
Purity:: ≥95% by SDS-PAGE analysis
Test activity:: ≥16 protein u / mg (determined by NUPTEC according to the modified green method)
Storage state:: -20 °C
Storage period:: 3 years

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Description

Streptavidin is a homotetrameric protein found in the culture broth of Streptomyces avidini. Similar to avidin, a streptavidin mole can bind 4 biotin moles with high affinity virtually unmatched in nature. Streptavidin lacks the carbohydrate side chains found on avidin and has an isoelectric point near neutrality. Therefore, it has a reduced non-specific binding level compared to avidin. Streptavidin has been widely applied in various biological fields, such as ELISA, IHC, TRFIA, PCR quantification, single-stranded nucleotide isolation, biomolecule purification, and monoclonal antibody production.

Compared to native streptavidin, r-cSA2 is improved in stability and solubility by removal of the activity-unrelated sequence. Compared to r-csa (nrpa09), the amino acid sequence of this product does not contain cysteine, so it does not need reduction therapy.

M: Protein molecular weight marker

Lane 1: r-cSA2 subunit

Channel 2: r-cSA2 homotetramer

For research use only!

Recombinant Core Streptavidin 2 (r-cSA2) DataSheet

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