Purity > 90% as determined by SDS-PAGE. MW: 30.1kDa. Partial: 1-251aa. N-terminal 6xHis-tagged. Abrus precatorius (Indian licorice) (Glycine abrus). The A chain is responsible for inhibiting protein synthesis through the catalytic inactivation of 60S ribosomal subunits by removing adenine from position 4,324 of 28S rRNA. Abrin-a is more toxic than ricin. The B chain is a galactose-specific lectin that facilitates the binding of abrin to the cell membrane that precedes endocytosis.