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  • Title: Identification of multiple ral gene products in human platelets that account for some but not all of the platelet Gn-proteins.
    Author: Bhullar RP, Chardin P, Haslam RJ.
    Journal: FEBS Lett; 1990 Jan 15; 260(1):48-52. PubMed ID: 2105235.
    Abstract:
    Polyclonal antibodies raised against specific recombinant low molecular mass GTP-binding proteins were tested for their ability to recognize partially purified human platelet membrane Gn-proteins (i.e. proteins that bind [alpha-32P]GTP on nitrocellulose blots of SDS/polyacrylamide gels). An antiserum against simian ralA protein recognized a 27 kDa human platelet protein with the same apparent molecular mass as the major platelet Gn-protein (Gn27). In further analysis by two-dimensional polyacrylamide gel electrophoresis, the isoelectric focusing step permitted resolution of 12 major Gn-protein forms, seven of 27 kDa (Gn27a-g), one of 26 kDa (Gn26) and four of 24 kDa (Gn24a-d). The ralA antibody reacted strongly with the five most basic Gn27 species (a-e), weakly with Gn26 and not at all with Gn27f, Gn27g or Gn24a-d. We conclude that ral gene products account for some but probably not for all of the platelet Gn-proteins.
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