title: Characterization of human red blood cell tyrosine kinase.
abstract: A new tyrosine kinase in human red blood cells has been characterized and partially purified. The major substrate was a protein of molecular weight 93 K which could be phosphorylated both in whole red blood cells incubated with inorganic [32P] orthophosphate and in ghost preparations incubated with [gamma 32P] ATP. This tyrosine kinase displayed an alkaline isoelectric pH (around 8.5), a molecular weight of 32-33 K and does not seem to be autophosphorylable. Some kinetics of the enzyme are reported. This red blood cell tyrosine kinase is unrelated to EGF and insulin or insulin-like receptor subunits. This enzyme may represent a novel class of tyrosine kinases.
mesh_terms: D001457:Anion Exchange Protein 1, Erythrocyte / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D004815:Epidermal Growth Factor / Q000494:pharmacology; D004912:Erythrocytes / Q000201:enzymology*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007328:Insulin / Q000494:pharmacology; D008565:Membrane Proteins / Q000378:metabolism; D011494:Protein Kinases / Q000097:blood*; D011505:Protein-Tyrosine Kinases
chemical_list: D001457:Anion Exchange Protein 1, Erythrocyte; D007328:Insulin; D008565:Membrane Proteins; D004815:Epidermal Growth Factor; D011494:Protein Kinases; D011505:Protein-Tyrosine Kinases