Although the peptides had different structures, they typically shared a handful of chemical features, such as phyenyl, hydroxyl, carboxylic acid, and isobutyl groups.

• 虽然说肽类具有不同的结构，但是他们都共同具有一些简单的化学特征，比如苯酰基，羟基，羧基以及异丁基团。