Analyses of the primary amino acid sequence of the activation domain predict the presence of three alpha-helices , each with a high proportion of acidic residues .
analyses of the primary amino acid sequence of the activation domain predict the presence of three alpha-helices , each with a high proportion of acidic residues .
O O O B-protein_domain_or_region I-protein_domain_or_region I-protein_domain_or_region I-protein_domain_or_region O O B-protein_domain_or_region I-protein_domain_or_region O O O O O B-protein_substructure O O O O O O O B-amino_acid_monomer I-amino_acid_monomer O