Anti-Neurofilament NF-H Antibody, phosphorylated Antibody, clone NP1 clone NP1, from mouse

Neurofilament heavy polypeptide (UniProt: P12036; also known as NF-H, 200 kDa neurofilament protein, Neurofilament triplet H protein) is encoded by the NEFH (also known as KIAA0845, NFH) gene (Gene ID: 4744) in human. Neurofilaments (~ 10 nm in diameter) are intermediate filaments that serve as major elements of the cytoskeleton supporting the axon cytoplasm. They are the most abundant fibrillar components of the axon, being on average 3-10 times more frequent than axonal microtubules. They are built from three intertwined protofibrils, which are themselves composed of two tetrameric protofilament complexes of monomeric proteins. The neurofilament triplet proteins (68/70, 160, and 200 kDa) occur in both the central and peripheral nervous system and are usually neuron specific. The 68/70 kDa NF-L protein can self-assemble into a filamentous structure, however the 160 kDa NF-M and 200 kDa NF-H proteins require the presence of the 68/70 kDa NF-L protein to co-assemble. Antibodies to NF-H are useful for identifying neuronal cells and their processes in tissue sections and in tissue culture. NF-H antibodies are helpful in the identification of neurofilament accumulations seen in many neurological diseases, such as Amyotrophic lateral sclerosis (ALS) and Alzheimer's disease. The purified immunogen used to generate this antibody was the very heavily phosphorylated form of NF-H and this antibody binds only this heavily phosphorylated form. Similar, but far fewer phosphorylation sites are also found in NF-M. Hence, this antibody displays some reactivity with NF-M. Enzymatic phosphorylation of porcine and bovine neurofilaments is shown to result in loss of binding.