- SMI 31 (See other available formats)
- Regulatory Status
- Other Names
- Neurofilament heavy polypeptide, NF-H, 200 kD neurofilament protein, neurofilament triplet H protein
- Mouse IgG1, κ
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- Product Citations
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Neurofilaments (NF) are approximately 10 nanometer intermediate filaments found in neurons. They are a major component of the neuronal cytoskeleton, and function primarily to provide structural support for the axon and to regulate the axon diameter. There are three major NF subunits, and the names given to these subunits are based upon the apparent molecular mass of the mammalian subunits on SDS-PAGE. The light or lowest NF (NF-L) runs at 68-70 kD. The medium or middle NF (NF-M) runs at about 145-160 kD, and the heavy or highest NF (NF-H) runs at 200-220 kD. However, the actual molecular weight of these proteins is considerably lower due to the highly charged C-terminal regions of the molecules. The level of NF gene expression correlates with the axonal diameter, which controls how fast electrical signals travel down the axon. Mutant mice with NF abnormalities have phenotypes resembling amyotrophic lateral sclerosis. NF immunostaining is common in diagnostic neuropathology. It is useful for differentiating neurons (positive for NF) from the glia (negative for NF).Product Details
- Human, Mouse, Rat
- Antibody Type
- Host Species
- Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
- The antibody was purified by affinity chromatography and conjugated with Alexa Fluor® 647 under optimal conditions.
- 0.5 mg/ml
- Storage & Handling
- The antibody solution should be stored undiluted between 2°C and 8°C, and protected from prolonged exposure to light. Do not freeze.
IHC-P - Quality tested
- Recommended Usage
Each lot of this antibody is quality control tested by formalin-fixed paraffin-embedded immunohistochemical staining. For immunohistochemistry, a concentration range of 5.0 - 10 µg/ml is suggested. It is recommended that the reagent be titrated for optimal performance for each application.
* Alexa Fluor® 647 has a maximum emission of 668 nm when it is excited at 633 nm / 635 nm.
Alexa Fluor® and Pacific Blue™ are trademarks of Life Technologies Corporation.
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- Application Notes
Additional reported applications (for the relevant formats) include: Western blotting1, immunohistochemistry2,4, and immunocytochemistry4.
SMI 31 reacts with a phosphorylated epitope in extensively phosphorylated neurofilament H and, to a lesser extent, with neurofilament M in most mammalian species, which chicken and frog (Xenopus). Immunocytochemically, SMI 31 reacts broadly with thick and thin axons and some dendrites such as basket cell dendrites, but not Purkinje cell dendrites. Nerve cell bodies are generally unreactive. Other cells and tissues are unreactive except for peripheral axons. Phosphatase treatment of tissue sections or Western blots abolishes reaction with SMI 31. Staining is unaffected by trypsin. In pathological conditions, reaction with SMI 31 may be found also in neuronal cell bodies. Aberrant phosphorylation of neurofilament H in cell bodies can be demonstrated in neuronal cell cultures with SMI 31 by agents that induce stress-activated protein kinase. In its reaction with paired helical filaments in hereditary inclusion body myopathy, SMI 31 colocalizes with nitric oxide synthase, suggesting that oxidative stress may play a role in the pathogenic cascade of such degenerative diseases. SMI 31 co-immunoprecipitates neurofilament-associated kinase (NAK 115) via reaction of the antibody with the tail domain of neurofilament H.
(PubMed link indicates BioLegend citation)
- Product Citations
AB_2750387 (BioLegend Cat. No. 801613)
AB_2750388 (BioLegend Cat. No. 801614)
- Neurofilament H has an apparent molecular mass of 200-220 kD.
Tissue distribution: CNS, peripheral nerves and glandular cells of the prostate.
Cellular distribution: Cytoskeleton, nucleus, cytosol, and mitochondrion.
- Neurofilaments are the major components of the neuronal cytoskeleton. They provide axonal support and regulate axon diameter.
- Cell bodies and dendrites are generally unstained. Other cells and tissues are unreactive except for peripheral axons.
- Cell Type
- Mature Neurons
- Biology Area
- Cell Biology, Neuroscience, Neuroscience Cell Markers
- Molecular Family
- Intermediate Filaments, Phospho-Proteins
- Antigen References
1. Petzold A. 2005. J. Neurol. Sci. 233 (1-2):183. PubMed
- Gene ID
- 4744 View all products for this Gene ID
- View information about Neurofilament H NF-H Phospho on UniProt.org
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