MUCH of the histamine in mammalian tissues is contained in tissue mast cells 1; but it is by no means certain how it is held at high concentration inside these cells. Evidence suggests that the mast ...

Mast cells are immune cells that responds to different pathogens, such as bacteria and parasites. In response to these pathogens, mast cells release different chemicals, such as histamine and heparin, ...

EARLIER experiments of ours have shown that the organism regulates the coagulability of the blood by the inactivation of thrombin 1,2. Many factors take part in the system causing the thrombin to ...