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  • 1
    ISSN: 1432-0428
    Keywords: Diabetic rats ; wheat germ agglutinin ; N-acetyl glucosamine ; glomerular basement membrane ; lectin histochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This study was designed to establish whether specific early changes in carbohydrate content of proteins in the glomerulus of the diabetic rat could be detected. Lectin staining of kidney sections from streptozotocin-induced diabetic rats were compared with similar sections from healthy and diabetic rats that were treated with insulin. Animal groups were killed 1 month, 3 months and 6 months after induction of diabetes. There were no differences in the staining of the glomerular basement membrane between control, insulin-treated and diabetic rats for the lectins concanavalin A, lotus tetragonolobus, soybean and kidney bean, with and without trypsinisation. Staining of the glomerulur basement membrane with wheat germ agglutinin after trypsinisation was significantly increased in the diabetic group when compared to both healthy and insulin-treated groups (p 〈 0.01). It was concluded that, in experimental diabetes mellitus in the rat, there is an accumulation of substances in the glomerular basement membrane and mesangium with an affinity for wheat germ agglutinin, most probably N-acetyl glucosamine, and this is partially prevented by insulin treatment.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0983
    Keywords: Key words APS kinase ; ATP sulphurylase ; Aspergillus nidulans ; Allosteric inhibition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The sD gene of Aspergillus nidulans has been cloned by heterologous screening of rationally selected cosmids. Co-transformation of the sD50 mutant JMP1 confirmed the presence of a functional gene. Sequence analysis determined this gene to be 680 bp in length, containing a 59-bp intron and encoding a protein of 206 amino acids. A protein-sequence comparison revealed a similarity to the C-terminal region of ATP sulphurylase, the sC gene product. Further sequence comparison revealed differences in a consensus sequence ATP-binding motif, indicating non-functionality of the APS kinase-like domain of ATP sulphurylase, and confirms sD as the gene encoding APS kinase in A. nidulans.
    Type of Medium: Electronic Resource
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