2. Experimental
2.1. Materials
The P. vulgaris seeds were provided by Obispo Colombres Agro-Industrial Experimental Center, Tucumán, Argentina. Cassava starch was kindly supplied by Indecar S.A., Argentina. Analytical grade standards and reagents were purchased from Sigma Chemical Co. Amersham Biotech product was used for gel permeation chromatography. Whatman number 1 paper was used for paper chromatography.