Description
Protein L has the unique ability to bind through kappa light chain interactions without interfering with the antibodys antigen-binding site. This gives Protein L the ability to bind a wider range of Ig classes and subclasses than other antibody-binding proteins. Protein L can be used to detect, quantify and purify antibodies and antibody/antigen complexes. s Recombinant Protein L contains only IgG binding domains. The albumin-binding domain as well as cell wall and cell membrane binding domains have been removed to ensure the maximum specific IgG binding capacity. The 6-His-tag on N-terminus can be used for affinity purification or protein L detection using anti-His-tag antibodies. Protein L binds to all classes of Ig (IgG, IgM, IgA, IgE, and IgD). Protein L will also bind Single Chain Variable Fragments (ScFv) and Fab Fragments. Protein L binds kappa I, III, and IV in human and kappa I on mouse.
Biomolecule/Target: N/A
Synonyms: Protein L
Alternates names: Cerebral dopamine neurotrophic factor, ARMETL1
Taglines: Genetically engineered protein ideal for purification of polyclonal or monoclonal IgG antibodies
NCBI Gene ID #: 441549
NCBI Gene Symbol: CDNF
Gene Source: Human
Accession #: Q49AH0
Recombinant: Yes
Source: E. coli.
Purity by SDS-PAGEs: 98%
Assay: SDS-PAGE
Purity: N/A
Assay #2: HPLC
Endotoxin Level: < 0.1 ng/g of protein (<1EU/g).
Activity (Specifications/test method): Determined by its ability to stimulate the proliferation of rat C6 cells. The expected ED50 for this effect is 15-25 µg/ml.
Biological activity: Determined by its ability to stimulate the proliferation of rat C6 cells. The expected ED50 for this effect is 15-25 µg/ml.
Results: N/A
Binding Capacity: N/A
Unit Definition: N/A
Molecular Weight: 18.5 kDa
Concentration: N/A
Appearance: Lyophilized
Physical form description: Sterile filtered through a 0.2 micron filter. Lyophilized from 10 mM Sodium Phosphate, pH 7.0.
Reconstitution Instructions: Centrifuge the vial prior to opening. Reconstitute in water to a concentration of 0.1-1.0 mg/ml. Do not vortex. For extended storage, it is recommended to further dilute in a buffer containing a carrier protein (example 0.1% BSA) and store in working aliquots at -20°C to -80°C.
Amino acid sequence: MQEAGGRPGA DCEVCKEFLN RFYKSLIDRG VNFSLDTIEK ELISFCLDTK GKENRLCYYL GATKDAATKI LSEVTRPMSV HMPAMKICEK LKKLDSQICE LKYEKTLDLA SVDLRKMRVA ELKQILHSWG EECRACAEKT DYVNLIQELA PKYAATHPKT EL