Recently, H_2S with the corresponding higher concentration found in animal tissues, has been proven as one kind of biologic messengers and named as the third gaseous transmitter following NO and CO.

• 近来在动物组织已经发现了相对高浓度的H_2S,提出了它作为生物信使的功能,使H_2S成为继一氧化氮(nitric oxide,NO)、一氧化碳(carbon monoxide,CO)之后的第三种气体信号分子。