Primary structures of concanavalin a-like lectins from seeds of two species of Canavalia

The amino acid sequences of two lectins from the seeds of Canavalia lineata and C. virosa have been determined by the manual Edman degradation method. Both proteins were found to be highly homologous to concanavalin A, a lectin from C. ensiformis. All the residues suggested to participate in binding to carbohydrates and metal ions are completely conserved in the proteins.