Белок, выделен из растения Abrus precatorius (сем. Бобовых).
Первичная структура:
001 EDRPIKFSTE GATSQSYKQF IEALRERLRG GLIHDIPVLP DPTTLQERNR YITVELSNSD
061 TESIEVGIDV TNAYVVAYRA GTQSYFLRDA PSSASDYLFT GTDQHSLPFY GTYGDLERWA
121 HQSRQQIPLG LQALTHGISF FRSGGNDNEE KARTLIVIIQ MVAEAARFRY ISNRVRVSIQ
181 TGTAFQPDAA MISLENNWDN LSRGVQESVQDT FPNQVTLTNI RNEPVIVDS LSHPTVAVL
241 ALMLFVCNPP NANQSPLLIR SIVEKSKICSSRYE PTVRIGGRDG MCVDVYDNG YHNGNRI
301 IMWKCKDRLE ENQLWTLKS DKTIRSNGKCLTTYG YAPGSYVMIY DCTSAVAEAT YWEIWD
361 NGTIINPKSA LVLSAESSSMG GTLTVQTNEYL MRQGWRTGN NTSPFVTSI SGYSDLCMQA
421 QGSNVWMADC DSNKKEQQ WALYTDGSIR SVQNTNNCLT SKDHKQGSTIL LMGCSNGWASQ
481 RWVFKNDGSI YSLYDDMVMD VKGSDPSLKQI ILWPYTGKPNQ IWLTLF-COOH