Recombinant Human NF-L Protein, CF

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Recombinant Human NF-L Protein, CF Summary

Product Specifications

>95%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Bioassay data are not available.
E. coli-derived human NF-L protein
Ser2-Asp338, with a C-terminal 6-His tag
Accession #
N-terminal Sequence
Predicted Molecular Mass
39 kDa
41 kDa, reducing conditions

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Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. 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 could interfere.


Formulation Lyophilized from a 0.2 μm filtered solution in Acetonitrile and TFA.
Reconstitution Reconstitute at 500 μg/mL in 4 mM HCl..
Shipping 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.
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Background: NF-L

Neurofilament light polypeptide (NF-L), also known as 68 kDa neurofilament protein, and neurofilament triplet L protein, is an approximately 68 kDa member of the neuronal intermediate filament family that plays a role in the maintenance of neuronal caliber and possibly the pathogenesis of motor neuron diseases (1, 2). Out of the three intermediate filament proteins (NF-L, NF-M, NF-H), NF-L is the most abundant. NF-L is a 542 amino acid (aa) cytoskeletal protein which consists of a 91 aa N-terminal head, a 304 aa alpha -helical rod, and a 147 aa C-terminal tail (3). Within the extracellular domains, human NF-L shares 95% and 96% sequence identity with mouse and rat NF-L, respectively.

  1. Monteiro, MJ. et al. (1990) J. Cell. Biol. 111:1543.
  2. Xu, Z. et al. (1993) Cell. 73:23.
  3. Adebola, A. et al. (2015) Hum. Mol. Genet. 24:2163.
Long Name
Neurofilament Protein, Light Chain
Entrez Gene IDs
4747 (Human)
Alternate Names
68 kDa neurofilament protein; CMT2E; NEFL; neurofilament protein, light chain; neurofilament subunit NF-L; Neurofilament triplet L protein; neurofilament, light polypeptide; neurofilament-light; NF68; NF68FLJ53642; NFL; NF-L; NFLlight polypeptide 68kDa


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