sequence of BTK BTK_HUMAN AGAMMAGLOBULINEMIA TYROSINE KINASE AGMX1 AT ATK Agammaglobulinaemia tyrosine kinase B-cell progenitor kinase BPK BTK Bruton agammaglobulinemia tyrosine kinase Bruton tyrosine kinase EC 2.7.10.2 IMD1 IMR:0700553 MGC126261 MGC126262 PSCTK1 Tyrosine-protein kinase BTK UniProt:Q06187 XLA molecule_role