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Comparative studies of galactokinase activity on mammal's red blood cells.
Metadata
JournalComp. Biochem. Physiol., BNot FoundDate
1979
Type
Journal Article
Comparative Study
Volume
1979 / 64 : 267-71
Author
Magnani M 1, Cucchiarini L , Stocchi V , Bossu M , Dacha M , Fornaini G
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Doi
PMIDMESH
Animals
Cattle
Erythrocytes
Galactokinase
Hot Temperature
Humans
Hydrogen-Ion Concentration
Mice
Rabbits
Rats
Species Specificity
Swine
Abstract
1. ATP: D-galactose-1-phosphotransferase activity was measured in human, pig, cow, rabbit, mouse and rat red blood cells. Mean values of galactokinase activity was markedly lower in the human and pig erythrocyte as compared to those of the other species. 2. The permeability to galactose of the red cells studied was always higher than galactose phosphorylation. 3. The affinity constants of galactokinase for galactose ranged from 119 to 291 microM and from 178 to 406 microM for ATPMg2-. 4. The thermostability values of the galactokinase of the species studied were similar. The pH-optimum is pH 7.5 for the human, mouse and rabbit enzyme and pH 8.0 for cow, pig and rat galactokinase.
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Comp. Biochem. Physiol., BComparative biochemistry and physiology. B, Comparative biochemistry
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