Amylose and amylopectin unit-chain distributions of starches from the roots of
Panax ginseng C.A. Meyer (PG) and
Panax notoginseng (Burk.) F.H. Chen (PN), tuber of
Pinellia ternata (Thunb.) Breitenbach (PT), rhizome of
Alisma orientale Juzepczuk (AO) and seed of
Coix lacryma-jobi Linné var.
ma-yuen Stapf (CL) were investigated by means of a gel filtration method. The amylose contents of the PG, PN, PT, AO and CL starches were 15.4-28.2, 25.9-35.7, 20.1-34.9, 26.6-35.2 and 17.2-26.4%, respectively. The ratios of subfractions (Fr. III/Fr. II) of amylopectin in PG, PN, PT and AO starches were 0.82±0.19, 0.93±0.13, 1.22±0.25 and 1.23±0.05, respectively. Those of CL starches were 0.97 and 3.49. The weight-average chain-lengths (CL
w) of amylopectin in PG, PN, PT, AO and CL starches were 33-47, 28-35, 22-32, 25-28 and 23-38, respectively. It was confirmed that the ratio of subfractions (Fr. III/Fr. II) was negatively correlated with CL
w. The weight-average degrees of polymerization (DP
w) of amylose from PG, PN, PT and CL starches were 2720-3590, 3240-3730, 2390-2710 and 3090-3880, respectively.
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