The PSME1 protein is critical for immunoproteasome assembly and is essential for efficient antigen processing. As part of the PA28 activator complex, PSME1, together with PSME2, actively enhances the production of class I binding peptides by altering the cleavage pattern of the proteasome. PSME1 Protein, Human (His) is the recombinant human-derived PSME1 protein, expressed by E. coli , with N-6*His labeled tag.
