After testing many other compounds , the team tried pectin .
再试过其他一些物质之后，小组又尝试了果胶。
Apples are an excellent source of pectin .
苹果是果胶的极好来源。
A study by the institute of food research has found that pectin , a natural gelling agent , can block the progress of cancer through the body by " sticking " to the protein gal3 , which causes tumour growth .
