title: The carboxyl third of tau is tightly bound to paired helical filaments.
abstract: To obtain definitive evidence that tau is a component of paired helical filaments (PHF) in Alzheimer's disease, we fractionated and sequenced PHF-derived peptides according to a previously described procedure. In the PHF digest, we found four independent tau peptides that were located in the carboxyl third of tau. Subsequent extensive analysis of the PHF digest did not provide any other tau peptides. The conventional PHF antiserum and a new antiserum directed toward formic acid-denatured PHF reacted with the distinct CNBr fragments of tau localized on the carboxy-terminal portion of tau by protein sequencing. From these observations, we conclude that the carboxyl third of tau is tightly bound to PHF.
authors: Mitsubishi Kasei Corporation Research Center, Biosciences Laboratory, Yokohama, Japan.
authors: J
authors: J
authors: Kondo
authors: T
authors: T
authors: Honda
authors: H
authors: H
authors: Mori
authors: Y
authors: Y
authors: Hamada
authors: R
authors: R
authors: Miura
authors: M
authors: M
authors: Ogawara
authors: Y
authors: Y
authors: Ihara
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000378:metabolism*; D000595:Amino Acid Sequence; D000939:Epitopes; D006801:Humans; D008869:Microtubule-Associated Proteins / Q000276:immunology*; D009454:Neurofibrils / Q000276:immunology*; D016875:tau Proteins
chemical_list: D000939:Epitopes; D008869:Microtubule-Associated Proteins; D016875:tau Proteins