Lefty proteins are novel TGF-beta ligands that function as antagonists of Nodal signaling. The expression of Lefty proteins on the left side of the developing mouse embryo earned this protein family its name. Two genes exist in mouse (Lefty-1 and Lefty-2) and two in humans (Lefty-A and Lefty-B). By amino acid sequence, human Lefty-A and Lefty-B are more similar to each other (96%) than to either Lefty-1 or Lefty-2 in the mouse (81-82%). The Leftys contains some of the features of the cysteine-knot structure conserved among TGF-beta-related proteins, but also some structural differences. Specifically, they lack the alpha-helical segment important for ligand dimerization as well as the cysteine residue involved in stabilization of dimers.
Lefty-1 Recombinant Protein Antigen
Novus Biologicals | Catalog # NBP2-48883PEP
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Key Product Details
Source
E. coli
Applications
Antibody Competition
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Product Specifications
Description
A recombinant protein antigen with a N-terminal His6-ABP tag corresponding to human Lefty-1.
Source: E. coli
Amino Acid Sequence: AQGDCDPEAPMTEGTRCCRQEMYIDLQGMKWAENWVLEPPGFLAYECVGTC
Fusion Tag: N-terminal His6ABP (ABP = Albumin Binding Protein derived from Streptococcal Protein G)
This product is intended to be used as a blocking antigen for antibody competition assays. Any other use of this antigen is done at the risk of the user. The use of this product for commercial production is strictly prohibited. Please contact technical support if you have any questions.
Purity
>80% by SDS-PAGE and Coomassie blue staining
Predicted Molecular Mass
23 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Applications
Antibody Competition (10 - 100 molar excess)
Application Notes
This recombinant antigen is only intended to be used as a blocking agent to confirm antibody specificity with the corresponding antibody, catalog number NBP2-48883.
It is purified by IMAC chromatography, and the expected concentration is greater than 0.5 mg/ml.
For current lot information, including availability, please contact our technical support team click nb-technical@bio-techne.com
Protein / Peptide Type
Recombinant Protein Antigen
Formulation, Preparation, and Storage
NBP2-48883PEP
| Formulation | PBS and 1M Urea, pH 7.4. |
| Preservative | No Preservative |
| Concentration | Please see the vial label for concentration. If unlisted please contact technical services. |
| Shipping | The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below. |
| Stability & Storage | Store at -20C. Avoid freeze-thaw cycles. |
Background: Lefty-1
Alternate Names
Leftb, Lefty-B, Lefty1
Gene Symbol
LEFTY1
Additional Lefty-1 Products
Product Documents for Lefty-1 Recombinant Protein Antigen
Certificate of Analysis
To download a Certificate of Analysis, please enter a lot or batch number in the search box below.
Product Specific Notices for Lefty-1 Recombinant Protein Antigen
This product is for research use only and is not approved for use in humans or in clinical diagnosis. This product is guaranteed for 1 year from date of receipt.
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