. Author manuscript; available in PMC: 2020 Mar 1.

Published in final edited form as: Immunogenetics. 2019 Jan 24;71(3):251–261. doi: 10.1007/s00251-019-01105-0

Table 1.

Members of the three catalytic subunit families in jawed vertebrates

Subunit	Other name	Gene symbol
β1	Y, PSMB6	PSMB6
β1i	LMP2, PSMB9	PSMB9
	PSMB12	psmb12
β2	Z, PSMB7	PSMB7
β2i	MECL1, PSMB10	PSMB10
	PSMB13	psmb13
β5	X, PSMB5	PSMB5
β5i	LMP7, PSMB8	PSMB8
β5t	PSMB11	PSMB11

Gene symbols given are those of humans, except for psmb12 and psmb13, which are found only in fish. In humans and chickens, gene symbols are upper-case italics. Chickens have only PSMB5, PSMB6 and PSMB7. In rodents, gene symbols are italicized, with only the first letter in upper-case. In Xenopus and fish, gene symbols are lower-case italics.