. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "psb4_human"^^ . "Multicatalytic endopeptidase complex beta chain"^^ . "Proteasome chain 3"^^ . "Macropain beta chain"^^ . "PSMB4"^^ . "PROS26"^^ . "26 kDa prosomal protein"^^ . . "Proteasome subunit beta type-4"^^ .