Comparison of protein extraction procedures to assess the effect of quantitative protein composition on the bread-making quality of South African winter wheat cultivars
作者:
van LillD.,
WentzelB.S.,
SmithMarieF.,
de VilliersO.T.,
期刊:
South African Journal of Plant and Soil
(Taylor Available online 1993)
卷期:
Volume 10,
issue 4
页码: 162-167
ISSN:0257-1862
年代: 1993
DOI:10.1080/02571862.1993.10634664
出版商: Taylor&Francis Group
关键词: Bread-making quality;protein extraction procedures
数据来源: Taylor
摘要:
A suitable technique for the extraction of wheat flour protein fractions was pursued to assess the effect of quantitative protein composition on the bread-making quality of winter wheat cultivars on a large scale. Nine procedures involving the use of different sequential solvent extractions were quantitatively compared. The distribution of protein components in the different solubility classes was checked by means of sodium dodecyl sulphate Polyacrylamide gel electrophoresis. The most effective procedure to fractionate the four major protein groups sequentially was: albumin (water),' globulin (0.5 M NaCI + 0.05 mM Na-EDTA), gliadin [55% (v/v) propan-2-ol] and glutenin [0.0125 M Na2B4O7, 0.043 M NaOH, 0.5% (m/v) SDS, 1% (v/v)β-mercaptoethanol].To validate this procedure, linear correlations between quality parameters and protein extracted for all localities and cultivars were complemented by principal component and best subset regression analysis. Albumin and globulin were weakly correlated with quality attributes whereas gliadin and glutenin were highly positively correlated. The contribution of relative glutenin content to dough strength was also confirmed. Since these results complied with present concepts on the relationships between protein fractions and functional properties, it was concluded that the technique could be applied for the protein fractionation of South African winter wheat cultivars.
点击下载:
PDF (473KB)
返 回