Highly toxic lectin (66 kD) from seeds of the castor bean, Ricinus communis. Has toxic A subunit (32 kD), carbohydrate binding B subunit (34 kD). Toxic subunit inactivates ribosomes and the binding subunit is specific for _ galactosyl residues.

This entry appears with permission from the Dictionary of Cell and Molecular Biology

(11 Mar 2008)