The cDNA of the Erythrina corallodendron lectin (ECorL) has been expressed in Escherichia coli. For this purpose, an NcoI site was inserted into the cDNA coding for the lectin precursor [Arango, R., Rozenblatt, S. & Sharon, N. (1990) FEBS Lett. 264, 109-112] immediately before the codon GTG