Tags: Protein.
Proteasome subunit alpha type-4 is a protein that in humans is encoded by the PSMA4 gene.The proteasome is a multicatalytic proteinase complex with a highly ordered ring-shaped 20S core structure. The core structure is composed of 4 rings of 28 non-identical subunits; 2 rings are composed of 7 alpha subunits and 2 rings are composed of 7 beta subunits.