| UniProtKB/Swiss-Prot |
| Q24238, APH4_DROME; | P05187, PPB1_HUMAN; | P81800, PPB1_PREIN; |
| P19405, PPB3_BACSU; | P19406, PPB4_BACSU; | P42251, PPBD_BACSU; |
| P24823, PPBE_MOUSE; | P35483, PPBH_PSEAE; | P19111, PPBI_BOVIN; |
| P09923, PPBI_HUMAN; | P24822, PPBI_MOUSE; | P15693, PPBI_RAT; |
| P51740, PPBJ_RAT; | P35482, PPBL_PSEAE; | P10696, PPBN_HUMAN; |
| P09487, PPBT_BOVIN; | Q92058, PPBT_CHICK; | Q29486, PPBT_FELCA; |
| P05186, PPBT_HUMAN; | P09242, PPBT_MOUSE; | P08289, PPBT_RAT; |
| P29523, PPB_BOMMO; | P00634, PPB_ECOLI; | P21948, PPB_ESCF3; |
| P83456, PPB_GADMO; | Q05205, PPB_LYSEN; | O60109, PPB_SCHPO; |
| P19147, PPB_SERMA; | P11491, PPB_YEAST; |
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