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Neurofilaments can be defined as the intermediate or 10nm filaments found in specifically in neuronal cells. In the electron microscope neurofilaments appears as 10nm diameter fibres of indeterminate length which generally have fine wispy protrusions from their sides. They are found particularly abundantly in axons of large projection neurons. Antibodies to the various neurofilament subunits are very useful cell type markers since the proteins are among the most abundant of the nervous system, are expressed only in neurons, and are biochemically very stable.
Image: Section of rat spinal cord stained with NF-H, phosphylated (green) and monoclonal antibody to UCHL1 (red). The neurofilament NF-H antibody binds primarily to phosphorylated axonal forms of NF-H, and so stains axons coursing between the large UCHL1 positive neurons. These large cells are a-motorneurons and UCHL1 protein is a major component of the perikarya and dendrites of these cells. Ptotocol on datasheet
The form of NF-H isolated is the heavily phosphorylated axonal variant, and the antibody generated recognizes predominantly axonal neurofilaments
Primary Neurons and Astrocytes-Primary human, rat and mouse neurons and astrocytes by Category
Image: Lane labelled CBB shows Coomassie Brilliant Blue stained crude extract of rat spinal cord, with the prominent major neurofilament subunit indicated; In rodents, NF-H runs at 200kDa, NF-M at 145kDa and NF-L at 68kDa. A prominent band at an apparent SDS-PAGE molecular weight of 200kDa corresponds to phosphorylated form of NF-H. The lane marked Rab shows a similar blot probed with our rabbit antibody to NF-H. Protocol on datasheet.