New Insights into the Function of the Immunoproteasome in Immune and Nonimmune Cells

Table 1

Human immunoproteasome subunits.

Subunit	Proteolytic activity	Molecular weight	Chromosome	Alternative name
i1	Chymotrypsin-like	23.3 kD	6p21.3	PSMB9, LMP2
i2	Undefined	28.9 kD	16q22.1	PSMB10, LMP10, and MECL-1
i5	Chymotrypsin-like	30.4 kD	6p21.3	PSMB8, LMP7
PA28	N/A	28.7 kD	14q11.2
PA28	N/A	27.4 kD	14q11.2