The Recombinant Protein L is comprised of 5 kappa-binding domains. Protein L has the exceptional ability to bind through kappa light chain interactions without hindering with the antibody’s antigen-binding site. This gives Protein L the capacity to bind a broader range of Ig classes and subclasses than other antibody-binding proteins. The recombinant Protein L is perfect for purification of polyclonal or monoclonal IgG antibodies. Protein L binds to IgG from humans, mice, rats and pigs.
Recombinant Protein-L produced in E.Coli is a single non-glycosylated polypeptide chain fused with a 6×His tag at N-terminus and a Cys on C-terminus. Protein-L is comprised of 5 IgG-binding regions of protein L (B1-B2-B3-B4-B5) containing 373 amino acids in total and having a molecular mass of 41.6kDa, however, it migrates with an apparent molecular mass of 46kDa on SDS-PAGE. Cell wall binding region, cell membrane binding region and albumin binding region have been eliminated from the recombinant Protein-L to guarantee the maximum specific IgG binding.
Sterile Filtered White lyophilized (freeze-dried) powder.
Protein-L was lyophilized without any additives.
It is recommended to reconstitute the lyophilized Protein-L in sterile 18M-cm H2O not less than 0.1mg/ml, which can then be further diluted to other aqueous solutions.
Lyophilized Protein-L although stable at room temperature for 3 weeks, should be stored desiccated below -18°C. Upon reconstitution Protein-L should be stored at 4°C between 2-7 days and for future use below -18°C. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).
Please prevent freeze-thaw cycles.
Greater than 96.0% as determined by SDS-PAGE.
Amino acid sequence
MHHHHHHKEE TPETPETDSE EEVTIKANLI FANGSTQTAE FKGTFEKATS EAYAYADTLK KDNGEYTVDV ADKGYTLNIK FAGKEKTPEE PKEEVTIKAN LIYADGKTQT AEFKGTFEEA TAEAYRYADA LKKDNGEYTV DVADKGYTLN IKFAGKEKTP EEPKEEVTIK ANLIYADGKT QTAEFKGTFE EATAEAYRYA DLLAKENGKY TVDVADKGYT LNIKFAGKEK TPEEPKEEVT IKANLIYADG KTQTAEFKGT FAEATAEAYR YADLLAKENG KYTADLEDGG YTINIRFAGK KVDEKPEEKE QVTIKENIYF EDGTVQTATF KGTFAEATAE AYRYADLLSK EHGKYTADLE DGGYTINIRF AGC.
Safety Data Sheet
Prospec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.