Rice glutelin consists of three acidic or a subunits of 30 to 39 kDa and two basic or ß subunits of 19 to 25 kDa [58]. The two kinds of subunits are formed by cleavage of a 57 kDa polypeptide precursor [59]. Prolamin consists mainly (90 percent) of the 13 kDa subunit plus two minor subunits of 10 and 16 kDa [60].