The toxicity of the pea albumin 1b (PA1b), a 37 amino-acid peptide extracted from pea seeds, for cereal weevils (Sito-philus oryzae, Sitophilus granariusandSitophilus zeamais) was recently mechanism of action of this new entomotoxin is still unknown and potentially involves a target protein in the insect work describes the characterization of a high-affinity binding site for PA1b in a microsomal fraction PA1b was labeled to a high specific radioactivity ( CiÆmmol )1 )using 125 I, and the iodinated ligand was found to be biologically of this ligand to the microsomal fraction ofS. .
