Product Specifications for Recombinant Human FLRT1 Protein, CF
Mouse myeloma cell line, NS0-derived human FLRT1 protein Ile21-Pro524, with a C-terminal 6-His tag
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain.
<0.10 EU per 1 μg of the protein by the LAL method.
N-terminal sequence Analysis
Predicted Molecular Mass
70-80 kDa, reducing conditions
Measured by the ability of the immobilized protein to support the adhesion of Neuro‑2A mouse neuroblastoma cells. Recombinant Human FLRT1 immobilized at 2.5 μg/mL, 100 μL/well, will meidate > 50% Neuro‑2A cell adhesion. Optimal dilutions should be determined by each laboratory for each application.
Formulation, Preparation and Storage
What does CF mean?
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our
Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant
protein to be stored at a more dilute concentration.
The carrier free version does not contain BSA.
What formulation is right for me?
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or
as an ELISA standard.
In contrast, the carrier free protein is recommended for applications, in which the presence of BSA
Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitute at 200 μg/mL in sterile PBS.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
3 months, -20 to -70 °C under sterile conditions after reconstitution.
FLRT1 is one of three FLRT (fibronectin, leucine rich repeat, transmembrane) glycoproteins expressed in distinct areas of the developing brain and other tissues (1, 2). The 90 kDa type I transmembrane (TM) human FLRT1 is synthesized as a 646 amino acid (aa) precursor with a 20 aa signal sequence, a 504 aa extracellular domain (ECD), a 21 aa TM segment and a 101 aa cytoplasmic region. The ECD contains 10 N-terminal leucine-rich repeats flanked by cysteine-rich areas, and a juxtamembrane fibronectin type III domain (1). The human FLRT1 ECD shares 97% aa sequence identity with mouse, rat, and canine, and 95% with bovine FLRT1 ECD. Human FLRT2 and FLRT3 ECDs share 47% and 61% aa identity, respectively, with FLRT1. The fibronectin domain of all three FLRTs can bind FGF receptors (2). This binding is thought to regulate FGF signaling during development (2, 3). The LRR domains are responsible for both the localization of FLRTs in areas of cell contact and homotypic cell-cell association (4). This may be through direct interactions with other FLRT molecules or, as has been shown for FLRT3, by regulating internalization of adhesion molecules such as cadherins (4, 5). Both during development and in adulthood, FLRT1 mRNA is predominantly expressed in brain and kidney (1). FLRT1 is expressed at brain compartmental boundaries in mouse embryos (2). Its expression is distinct from that of FLRT2 and FLRT3 (2).
Lacy, S. E. et al. (1999) Genomics 62:417.
Haines, B. P. et al. (2006) Dev. Biol. 297:14.
Bottcher, R. T. et al. (2004) Nat. Cell Biol. 6:38.
Karaulanov, E. E. et al. (2006) EMBO Rep. 7:283.
Ogata, S. et al. (2007) Genes Dev. 21:1817.
Fibronectin Leucine Rich Transmembrane Protein 1
Entrez Gene IDs
23769 (Human); 396184 (Mouse)
FLRT1, Fibronectin-like domain-containing leucine-rich transmembrane protein 1, MGC21624, SPG68, fibronectin leucine rich transmembrane protein 1, leucine-rich repeat transmembrane protein FLRT1
Citations for Recombinant Human FLRT1 Protein, CF
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Product Documents for Recombinant Human FLRT1 Protein, CF
Which Brands are Currently Available on bio‑techne.com? R&D Systems, Tocris Bioscience and ProteinSimple branded products are available to purchase through bio‑techne.com. ProteinSimple branded instruments are available to quote. ACD branded products will be available on bio‑techne.com in the near future. Novus Biologicals branded products are not currently available on bio‑techne.com and can be found at novusbio.com.
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