Differentiation of ß-Amylase Phenotypes in Cultivated Barley
Wensheng Zhanga,
Takafumi Kanekob,
Makoto Ishiic and
Kazuyoshi Takedac,*
a Shijiazhuang Institute of Agricultural Modernization, Chinese Academy of Sciences, 286 Huaizhong Road, Shijia-zhuang, Hebei 050021, China
b Plant Bioeng. Res. Lab. Sapporo Brew. Ltd., 37-1, Kizaki, Nitta, Gunma 370-0393, Japan
c Research Institute for Bioresources, Okayama Univ., Chuo 2-20-1, Kurashiki, Okayama 710-0046, Japan

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Fig. 1. Frequency distribution of ß-amylase thermostability types in cultivated barley (n = 8263). Relative remaining activity after heat-treatment at 57.5°C for 30 min: A+: 68%; A: 5862%; AB:3847% (OUI462 and OUI429, respectively); B: 2535%; C: 15%.
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Fig. 2. Zymograms of ß-amylase in cultivated barley. Isoelectric focusing was done with a Phastsystem (Pharmcia, Sweden) and ready-made acrylamide gel (PhastGEL IEF 4.0-6.5; Amersham Bioscience, Uppsala, Sweden). Lane 1: Harrington; 2: OUNI096; 3: OUC1152; 4: Haruna Nijo; 5: OUI429; 6: OUI462; 7: OUU421.
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Fig. 3. Distribution of five major ß-amylase types in the world.
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Copyright © 2004 by the Crop Science Society of America.