Ascomycetes 2 Ascomycota 2 GTP-binding proteins 2 Mammalia 2 Saccobolus 2 Saccobolus platensis 2 Vertebrata 2 adenosine triphosphate 2 article 2 ascomycete 2 binding competition 2 cholera toxin 2 dissociation constant 2 guanine nucleotide binding protein 2 guanosine triphosphate 2 immunoblotting 2 membrane binding 2 nonhuman 2 photodifferentiation 2 polyacrylamide gel electrophoresis 2 priority journal 2 protein subunit 2 sulfur 35 2