n.几丁质；角质素
The exoskeleton of insects is largely made of protein and chitin. 昆虫的外骨骼大部分是由蛋白质和几丁质组成的.
Glucosamine can help to synthesize chitin in crustacean shells, which aids growth. 葡萄糖氨是甲壳类动物帮助壳中几丁质的生成,可促进生长。
In most species the walls of hyphal cells contain chitin. 大多数真菌的细胞壁含有明角质。
