FOOD SCIENCE ›› 2013, Vol. 34 ›› Issue (9): 42-46.doi: 10.7506/spkx1002-6630-201309010

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Major Protein Fractions and Subunit Contents in Peanut from Different Cultivars

DU Yin,WANG Qiang*,LIU Hong-zhi,WANG Li,LIU Li   

  1. Key Laboratory of Agro-products Processing, Ministry of Agriculture, Institute of Agro-products Processing Science and Technology,
    Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2012-05-18 Revised:2013-03-26 Online:2013-05-15 Published:2013-05-07
  • Contact: Qiang Wang E-mail:wangqiang365@263.net

Abstract:

The composition of peanut protein from 170 different cultivars in China was analyzed by SDS-PAGE as well
as the relative content of major fractions. There were significant variations in protein composition and the relative content
of subunits among these peanut cultivars. Both arachin and conarachin were found in each cultivar, with a ratio between
0.80 and 1.68, and a coefficient of variation (CV) of 15.23%. This CV larger than 10% suggests great differences in protein
composition among different peanut cultivars. In addition, significant variations were also observed in the relative content
of subunits; in arachin, the 35.5 kD subunit presented the largest CV of 55.07%, which, however, was absent from 20.59%
(35/170, such as ShuangJi 35) of all the tested cultivars. Moreover there was an extremely significantly negative correlation
between arachin and conarachin(r = -0.998).

Key words: peanut protein, arachin, conarachin, subunit composition, relative content

CLC Number: