In the part , the author ' s intention is mensurating the molecular weight of the polypeptides by sodium dodecyl sulfate polyacrylamide gel electro - phoresis . the result shows that one of the polypeptides which we have mensurated is about 17 , 000da . the conclusion is that the components which we have separated and purified are small molecule polypeptides . 5 红褐林蚁多肽蛋白质的分子量测定本部分旨在通过sds -聚丙烯酰胺凝胶电泳测出所得多肽蛋白质的相对分子量，测得其中一组分的相对分子量为17000da左右，结论为所分离、纯化的物质是小分子的多肽。
