Bruton's agammaglobulinemia tyrosine kinase ( Btk ) is a cytoplasmic tyrosine kinase involved in the human disease X-linked agammaglobulinemia ( XLA ) .
bruton's agammaglobulinemia tyrosine kinase ( btk ) is a cytoplasmic tyrosine kinase involved in the human disease x-linked agammaglobulinemia ( xla ) .
B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O O O B-other_name I-other_name O B-other_name O O