NFH, or Neurofilament, heavy polypeptide, is a human gene encoded by NEFH. It may also be known as: Neurofilament heavy polypeptide; NF-H; 200 kDa neurofilament protein; Neurofilament triplet H protein. The encoded protein has an amino acid length of 1026 and a mass of 112.5 kDa. Other isoforms may exist. NFH is a member of the Intermediate filament family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Frog, Chicken.