sequence of importin alpha2 IMA2_HUMAN IMPORTIN ALPHA-1 IMR:0702102 IPOA1 Importin subunit alpha-2 KARYOPHERIN ALPHA-2 KPNA2 Karyopherin subunit alpha-2 QIP2 RAG cohort protein 1 RCH1 RECOMBINATION-ACTIVATING GENE COHORT 1 SRP1 SRP1-alpha SRP1alpha UniProt:P52292 karyopherin alpha 2 (RAG cohort 1, importin alpha 1) molecule_role