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Product Usage Information

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 μg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

Specificity / Sensitivity

Neurofilament-L (DA2) Mouse mAb detects endogenous levels of total Neurofilament-L protein. This antibody does not stain Neurofilament-L in cultured human cells by immunofluorescence and is recommended for rodent tissues only.

Species Reactivity:

Human, Mouse, Rat

Source / Purification

Monoclonal antibody is produced by immunizing animals with purified and enzymatically dephosphorylated pig neurofilament, light chain.

Background

The cytoskeleton consists of three types of cytosolic fibers: actin microfilaments, intermediate filaments, and microtubules. Neurofilaments are the major intermediate filaments found in neurons and consist of light (NFL), medium (NFM), and heavy (NFH) subunits (1). Similar in structure to other intermediate filament proteins, neurofilaments have a globular amino-terminal head, a central α-helical rod domain, and a carboxy-terminal tail. A heterotetrameric unit (NFL-NFM and NFL-NFH) forms a protofilament, with eight protofilaments comprising the typical 10 nm intermediate filament (2). While neurofilaments are critical for radial axon growth and determine axon caliber, microtubules are involved in axon elongation. PKA phosphorylates the head domain of NFL and NFM to inhibit neurofilament assembly (3,4). Research studies have shown neurofilament accumulations in many human neurological disorders including Parkinson's disease (in Lewy bodies along with α-synuclein), Alzheimer's disease, Charcot-Marie-Tooth disease, and Amyotrophic Lateral Sclerosis (ALS) (1).

1. Al-Chalabi, A. and Miller, C.C. (2003) Bioessays 25, 346-55.
2. Cohlberg, J.A. et al. (1995) J Biol Chem 270, 9334-9.
3. Hisanaga, S. et al. (1994) Mol Biol Cell 5, 161-72.
4. Sihag, R.K. et al. (1999) J Neurochem 72, 491-9.