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  • 1
    Digitale Medien
    Digitale Medien
    Separation of β-d-galactosidases in rabbit tissues: Genetics of neutral β-d-galactosidase (1983)
    Springer
    Biochemical genetics 21 (1983), S. 177-189 
    Details
    ISSN: 1573-4927
    Schlagwort(e): β-d-galactosidase ; β-d-glucosidase ; electrophoresis ; genetics ; rabbit
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Three different types of β-d-galactosidase (EC 3.2.1.23) could be distinguished in rabbit tissues using electrophoretic procedures. (1) Acid β-d-galactosidase with a low mobility and maximal activity at pH 3–5 was found in the particulate fraction of various tissue homogenates. This enzyme hydrolyzed 4-methylumbelliferyl-d-galactoside, but no activity against other glycoside substrates could be demonstrated. The enzyme was inhibited by galactono-(1 → 4)-lactone. (2) Lactose-hydrolyzing β-d-galactosidase with an intermediate mobility was found only in juvenile small intestine. Most of the activity was found in the particulate fraction of the cell. The enzyme hydrolyzed several other synthetic glycoside substrates besides lactose. It was most active at pH 5–6 and strongly inhibited by glucono-(1 → 5)-lactone but not much affected by galactono-(1 → 4)-lactone. (3) Neutral β-d-galactosidase with a fast mobility and maximal activity at pH 6–8 was found in the soluble fraction of homogenates from liver, kidney, and small intestine. This enzyme also showed a broad substrate specificity; it possessed activity against aryl-β-d-glucoside, -fucoside, and -galactoside substrates but not against lactose. The enzyme was strongly inhibited by glucono-(1 → 5)-lactone and (less) by galactone-(1 → 4)-lactone. Neutral β-d-galactosidase and neutral β-d-glucosidase (EC 3.2.1.21) are probably identical enzymes in the rabbit. Individual variation, in both electrophoretic mobility and activity, was found for neutral β-d-galactosidase. Genetic analysis of the electrophoretic variants revealed that two alleles at an autosomal locus are responsible for this variation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00000016
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Genetics of a tissue esterase polymorphism (Est-6) in the rabbit (Oryctolagus cuniculus) (1987)
    Springer
    Biochemical genetics 25 (1987), S. 335-344 
    Details
    ISSN: 1573-4927
    Schlagwort(e): esterase ; genetics ; homology ; rabbit
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Genetic analysis of a polymorphic tissue esterase revealed a new locus (Est-6) with two alleles (Est-6 a andEst-6 b) on linkage group VI of the rabbit.Est-6 is closely linked to theEst-1,2,4 cluster. Esterase ofEst-6 is found in many organs, particularly in liver and small intestine, but not in erythrocytes and serum.Est-6 esterase hydrolyzes α-naphthyl acetate and butyrate, naphthol AS-D acetate, indoxyl acetate, and butyrate as well as 5-bromoindoxyl acetate,N-acetyl-l-alanine-α-naphthyl ester but not 4-methylumbelliferyl acetate and fluorescein diacetate. The enzyme is inhibited by bis-p-nitrophenyl phosphate and eserine but not byp-chloromercuribenzoate. It was classified as a carboxylesterase (EC 3.1.1.1). Based on chromosomal localization, tissue distribution, substrate specificity, inhibitor sensitivity, and range ofpI's, rabbitEst-6 is assumed to be homologous with mouseEs-7.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00554543
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Separation of β-d-galactosidases in rabbit tissues: Genetics of neutral β-d-galactosidase (1983)
    Springer
    Biochemical genetics 21 (1983), S. 177-189 
    Details
    ISSN: 1573-4927
    Schlagwort(e): β-d-galactosidase ; β-d-glucosidase ; electrophoresis ; genetics ; rabbit
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Three different types of β-d-galactosidase (EC 3.2.1.23) could be distinguished in rabbit tissues using electrophoretic procedures. (1) Acid β-d-galactosidase with a low mobility and maximal activity atpH 3–5 was found in the particulate fraction of various tissue homogenates. This enzyme hydrolyzed 4-methylumbelliferyl-d-galactoside, but no activity against other glycoside substrates could be demonstrated. The enzyme was inhibited by galactono-(1 → 4)-lactone. (2) Lactose-hydrolyzing β-d-galactosidase with an intermediate mobility was found only in juvenile small intestine. Most of the activity was found in the particulate fraction of the cell. The enzyme hydrolyzed several other synthetic glycoside substrates besides lactose. It was most active atpH 5–6 and strongly inhibited by glucono-(1 → 5)-lactone but not much affected by galactono-(1 → 4)-lactone. (3) Neutral β-d-galactosidase with a fast mobility and maximal activity atpH 6–8 was found in the soluble fraction of homogenates from liver, kidney, and small intestine. This enzyme also showed a broad substrate specificity; it possessed activity against aryl-β-d-glucoside, -fucoside, and -galactoside substrates but not against lactose. The enzyme was strongly inhibited by glucono-(1 → 5)-lactone and (less) by galactone-(1 → 4)-lactone. Neutral β-d-galactosidase and neutral β-d-glucosidase (EC 3.2.1.21) are probably identical enzymes in the rabbit. Individual variation, in both electrophoretic mobility and activity, was found for neutral β-d-galactosidase. Genetic analysis of the electrophoretic variants revealed that two alleles at an autosomal locus are responsible for this variation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02395402
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Genetics of two tissue esterase polymorphisms (Est-4 and Est-5) in the rabbit (1983)
    Springer
    Biochemical genetics 21 (1983), S. 773-780 
    Details
    ISSN: 1573-4927
    Schlagwort(e): esterase ; polymorphisms ; genetics ; rabbit
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Two polymorphic esterase systems were found after electrophoresis of rabbit tissue homogenates. Each of these systems is controlled by an autosomal locus with two alleles. Est-4 determines the absence (Est-4a) or presence (Est-4b) of two bands of esterase activity with intermediate anodal mobility and broad substrate specificity. This polymorphism was found to be present in liver, small intestine, and spleen but not in kidney, heart, and testis. Est-5 is coding for cathodally migrating esterases which differ in mobility (Est-5a and Est-5b). This polymorphism was found only in kidney and testis homogenates. Est-5 esterases are more active against α-naphthyl acetate than against β-naphthyl acetate and have no activity against α-naphthyl butyrate. Linkage analysis indicated that Est-4 is localized on rabbit LG VI as part of a cluster of esterase loci, whereas Est-5 segregates independently. Rabbits from two inbred and nine partly inbred strains were tested for these polymorphisms.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00498923
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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