It has the ability to bind itself to small amounts of acid in the blood, which helps with removing that acid before the blood’s pH changes
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
They are viruses that infect bacteria and require a bacterial host in order to replicate themselves