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 orientate Juzepczuk (AO) and seed of Coix lacryma-jobi Linne 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 sub-fractions (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 (CLw) 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 CLw. The weight-average degrees of polymerization (DPw) of amylose from PG, PN, PT and CL starches were 2720-3590, 3240 3730, 2390-2710 and 3090 3880, respectively.%ニンジンPanax ginseng C.A.Meyer（PT）とサンシナニrnンジンPanax notoginseng（Burk.）F.H.Chen（PN）の根，ハrnンゲPinellia ternata （Thunb.）Breitenbach（PT）の根茎，タrnクシヤAlisma orientale Juzepczuk（AO）の根茎，ヨクイニrnンCoix lacryma-jobi Linne var.ma-yuen Stapf（CL）の種子rnから調製された澱粉のアミロースとアミロペクチンの単rn位鎖長分布をゲルろ過法により調べた．澱粉のアミローrnス含量は，それぞれPG,15.4-28.2%；PN,25.9-5.7%；rnPT,20.1-34.9%；AO,26.6-35.2%；CL,17.2-26.4%でrnあった（Table 1）．澱粉のアミロペクチンの短鎖区分／長鎖rn区分（Fr.III/Fr.II）の比は，それぞれPG,0.82±0.19;rnPN,0.93±0.13;PT,1.22±0.25;AO,1.23±0.05であり，rnCLは0.97と3.49であった（Table 1）．アミロペクチンのrn重量平均単位鎖長は，それぞれPG,34-47;PN,28-35;rnPT,22-32;AO,25-28;CL,23-38であった（Table 2）．rn短鎖区分／長鎖区分（Fr.III/Fr．II）の比と重量平均単位鎖rn長（CLw）の間には負の相関性が認められた（Fig.1）．アrnミロースの重量平均重合度は，それぞれPG,2720-rn3590;PN,3240-3730;PT,2390-2710;CL,3090-3880rnであった（Table3）．
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