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支链淀粉:(Amylopectin)具有树枝形分支结构的多糖。
1、称胶淀粉。葡萄糖以α-1,4-糖苷键连接为主链,并有α-1,6-糖苷键连接作为分支点而形成的葡聚糖,分子很大,可含数千个葡萄糖残基或更多。相对分子质量约为100万,有些可达600万。天然淀粉中70%~80%为支链淀粉。支链淀粉难溶于水,不显现还原性,遇碘呈棕色或红紫色。2、支链淀粉(amylopection)又称胶淀粉,分子相对较大,一般由几千个葡萄糖残基组成.支链淀粉难溶于水,其分子中有许多个非还原性末端,但却只有一个还原性末端,故不显现还原性.支链淀粉遇碘产生棕色反应.在食物淀粉中,支链淀粉含量较高,一般65%-
Say glue is amylaceous. Dextrose with α - 1, 4- candy glucoside bolts join gives priority to catenary, have α - 1, the Pu that join of key of 6- candy glucoside is nodded as branch and forms gets together candy, the member is very old, can contain thousands of dextrose incomplete radical or more. Opposite element quality is about 1 million, some can be amounted to 6 million. 80 % of ~ of the 70 % in natural starch are the starch that pay chain. Difficult dissolve of the starch that pay chain at water, do not show reproducibility, encounter iodine to show brown or magenta.
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