The complete amino acid sequence of rice storage protein glutelin was determined by the sequencing of the corresponding cDNA. The deduced glutelin precursor has a 37 amino acid signal peptide sequence at the NH2 terminus, which is followed by a 269 amino acid acidic subunit (M r = 32 489) and a 193 amino acid basic subunit (M r = 19 587). The glutelin precursor sequence is homologous to those of pea legumin and soybean glycinin.