PROTEASOME ACTIVATOR COMPLEX SUBUNIT 1 (PROTEASOME ACTIVATOR 28-ALPHA SUBUNIT) (PA28ALPHA) (PA28A) (ACTIVATOR OF MULTICATALYTIC PROTEASE SUBUNIT 1) (11S REGULATOR COMPLEX ALPHA SUBUNIT) (REG-ALPHA) (INTERFERON GAMMA UP-REGULATED I-5111 PROTEIN) (IGUP I-5111). [Source:SWISSPROT;Acc:Q06323]