Abstract
Antisera raised against a highly conserved amino acid sequence (G alpha-common peptide) of animal Gs alpha, Gi alpha, Go alpha and Gt alpha recognize, in plasma membranes of several higher plants, sets of proteins of Mr = 37 and 31 kDa (Vicia faba), 36 and 31 kDa (Arabidopsis thaliana) and 38 and 34 kDa (Commelina communis). The A. thaliana proteins were solubilized and partially purified. They bind [35S]GTP gamma S with high affinity (apparent Kd approximately 10 nM) and, with lower affinity, GTP but not the other nucleotides tested (ATP, CTP, ITP, UTP).
Published Version
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