Structure and function of cadmium adsorbing materials in higher plants.

镉主要分布在高等植物马齿苋的匀浆沉淀物中。用果胶酶消化沉淀物，释放出溶液中的镉。通过几步层析从溶液中提纯了镉结合物质，其中应用了新开发的软金属络合剂检测方法。经核磁共振波谱分析，确定其结构为多糖。

Majority of cadmium was distributed in precipitated fraction of homogenate of the higher plant Portulaca oleracea. Digestion of the precipitate with pectinase released cadmium in the solution. Cadmium-binding substance was purified from the solution using several steps of chromatography, where detection method for soft-metal chelator that was newly developed was applied. The structure of the purified substance was determined to be polysaccharides by NMR spectrometry.