>sp|Q55D66|PSB3_DICDI Proteasome subunit beta type-3 OS=Dictyostelium discoideum GN=psmB3 MSIMAYNGGACIVMVGKNCVAIASDLRFGIQQQTISNDFPKVYRINDKCFVGISGLVTDA QTLYQKLVFRHNLYKLREERDMSPRVVSNLLTNMLYEKRFGPYFTEPLICGLEGPDNTPF ISGMDLIGASVATDDFLVVGTMTPAMYGVCETLYKKDMNEDDLFETISQCMLASLDRDAL SGWGAIVHVITPTQVITKKLLGRQD