Any of various polypeptide hormones that are formed locally in the tissues and have their chief effect on smooth muscle.

激肽(在组织本身产生的几种多激肽素之一，主要作用于平滑肌)。

Any of various plant growth factors that are related to adenine and play a part in fundamental growth processes.

细胞分裂素(与腺嘌呤相关的几种植物生长因素之一，在基本生长过程中起作用)。