Abstract
Selected physico-chemical properties of pea legumin before and after succinylation have been investigated using isoelectric focusing, PAGE, SDS-PAGE, hydrophobicity measurements, SE-HPLC and RP-HPLC. Exhaustive succinylation shifted the I.P. of legumin from 4.75 to 3.5. The stepwise dissociation of legumin by increasing succinylation has been confirmed both by means of PAGE in a nondenaturing system, and by SE-HPLC. The results of SDS-PAGE provided evidence for the exposure of alpha-polypeptide chains in the native legumin. High succinylation resulted in a decrease of the surface hydrophobicity (S0) measured by both fluorescence probes (cis-parinaric acid and anilino-naphthalene sulfonic acid). RP-HPLC gave a response both to conformational changes and the introduced succinyl residues.
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