Structures of amylose subfractions with different molecular sizes

✍ Scribed by Yasuhito Takeda; Nobuhisa Maruta; Susumu Hizukuri

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 517 KB
• Volume: 226
• Category: Article
• ISSN: 0008-6215
• DOI: 10.1016/0008-6215(92)84076-5

✦ Synopsis

The structures of subfractions (3&38% of the total), having G., -2500, -1500, and -400 (d.p., -6300, -1800, and -600), of amyloses from maize and rice have been analysed and found to be similar. The subfractions with d.p., -400 preponderated (66%) and were rich in linear molecules (maize 71%) rice 75%), whereas those with d.p., -2500 contained mainly branched molecules (maize 66%) rice 61%). The branched molecules in the subfractions with d.p., -2500 and -400 had large (maize 14.5, rice 10.5) and small (maize 3.1, rice 2.6) numbers of chains on average, respectively, and that in the subfraction withd$, -1500 had an intermediate number. The branched molecules in each subfraction comprised the short-chain fraction (probably G., -18), and the larger branched molecules had a larger number of the short chains. The C chain of the larger branched molecules appeared to be the longer.