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Expression of functional hexahistidine-tagged ricin B in tobacco. | LitMetric

AI Article Synopsis

Article Abstract

Ricin B (RTB), the lectin subunit of ricin, shows promise as an effective mucosal adjuvant and carrier for use in humans. In order to obtain a recombinant plant source of RTB that is devoid of the toxic ricin A subunit, we expressed RTB in Nicotiana tabacum. RTB was engineered with an N-terminal hexahistidine tag (His-RTB), which may affect protein stability. Lactose-affinity purification of His-RTB from leaves yielded three major glycosylated products of 32, 33.5 and 35 kDa. Their identity as RTB was verified by mass spectrometry and immunoblotting with anti-ricin antibodies. Functionality of His-RTB was confirmed by binding to asialofetuin, lactose and galactose.

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http://dx.doi.org/10.1007/s00299-004-0901-0DOI Listing

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