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  • 1975-1979  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 29 (1977), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: γ-Glutamylation of p-tyramine, noradrenaline, dopamine and serotonin in rat brains was demonstrated by intraventricular injections of the radioactive amines and isolation of the γ-glutamylamines from the acidic extract of the rat brains. Formation of these γ-glutamylamines was proved to be catalysed by γ-glutamyltranspeptidase prepared from both rat kidney and brain. However, these compounds were degraded by γ-glutamylcyclotransferase of rat brain, but not by the emzyme of rat kidney.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 24 (1975), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: —Methods for the determination of methyl-lysine, methyllarginine and methylhistidine residues of tissue proteins are described. They consist of preliminary purification of basic amino acids, enzymic removal of lysine, arginine and histidine followed by amino acid analysis. Recovery rates and specificities of the method were satisfactory. The contents of methylamino acids in proteins of mammalian organs were determined.The distribution of proteins containing the methylamino acids in human brain showed that the concentrations of methyl-lysine and NG,N′G-dimethylarginine were highest in the gray matter of the cerebellar cortex and relatively high in regions rich in gray matter, while those of NG-mono- and NG,N′G-dimethylarginine were highest in the white matter. The following findings suggest that most of the NG-mono- and NG,N′G-dimethylarginine was associated with the myelin basic protein. The distribution of the methylarginine residues of acid-soluble proteins in bovine brains coincided with the cerebroside pattern. The concentrations of the amino acids in acid-soluble proteins of rat brain increased concomitantly with the increase of cerebroside. The methylamino acid content in proteins increased during the purification of the myelin basic protein from the white matter of human and bovine brains.Proteins containing NG,NG-dimethyiarginine and di- and trimethyl-lysine are concentrated in cell nuclei. The first amino acid was found mainly in nucleoplasmic proteins and the other two were found in histones. The concentration of 3-methylhistidine residue, highest in muscular proteins, is low in cerebral proteins and is probably derived from proteins of walls of blood vessels in the brain.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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