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  • 1
    Electronic Resource
    Electronic Resource
    Cyclic AMP-dependent protein kinase in calf-snout epidermis (1986)
    Springer
    Archives of dermatological research 278 (1986), S. 367-371 
    Details
    ISSN: 1432-069X
    Keywords: Protein phosphorylation ; Cyclic AMP ; Cyclic AMP-dependent protein kinase ; Keratin polypeptide ; Calf-snout epidermis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The biochemical characteristics of cyclic AMP-dependent protein kinase in calf-snout epidermis were investigated. The activity of cyclic AMP-dependent protein kinase was higher in the lower layer than the upper layer of epidermis. The supernatant of homogenates of the lower layer of calf-snout epidermis was fractionated by DEAE-cellulose chromatography and contained two major peaks of protein kinase activity stimulated by cyclic AMP. This chromtographic pattern is similar to that referred to as Type I and Type II of cyclic AMP-dependent protein kinase in bovine muscle. Both peaks of cyclic AMP-dependent protein kinase in calf-snout epidermis could phosphorylate keratin polypeptides in vitro. The phosphorylation reaction was activated by cyclic AMP and inhibited by a heat-stable inhibitor of cyclic AMP-dependent protein kinase. When Type II enzyme of cyclic AMP-dependent protein kinase was incubated with [γ-32P]ATP in the absence of substrates, such as histone or keratin polypeptides, the 54,000 dalton protein was phosphorylated and this autophosphorylation was inhibited by the addition of 10 μM cyclic AMP. These results suggest that cyclic AMP-dependent protein kinase in calf-snout epidermis has properties similar to those in bovine muscle and plays an important role in the phosphorylation of keratin polypeptides in calf-snout epidermis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00418164
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The effect of pH on the high pH anion-exchange chromatography elution of monosaccharides (1999)
    Springer
    Chromatographia 49 (1999), S. 699-702 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Anion-exchange chromatography ; High ph elvents ; Monosaccharides ; Carbopac PA-100
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary We have studied the elution behaviour of six common monosaccharides, fucose, galactosamine, glucosamine, galactose, glucose and mannose, on the CarboPac PA-100 column. The relative elution positions of galactose, glucose and mannose were dependent on the sodium hydroxide concentrations, a phenomenon which was likely to be the result of differential ionisation of the hydroxyl groups at ring positions two and four. The optimal resolution of the monosaccharides studied was achieved by elution with 30 mM sodium hydroxide with no appreciable loss in sensitivity at this low concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02466915
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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