Accepts electrons from cytochrome c, ultimately transferring them to oxygen, forming H2O. in the process, 2 protons are pumped across the membrane. Complex IV is a terminal oxidoreductase, meaning that it transferes the elctrons to the terminal electron acceptor, which, in this case, is O2.
White blood cells called lymphocytes originate in the bone marrow but migrate to parts of the lymphatic system such as the lymph nodes, spleen, and thymus. There are two main types of lymphatic cells, T cells and B cells.
In acute virus infection, macrophage is recruited from the circulation in stimulation of chemokines and serves as a powerful killer of invading pathogens with the secretion of inflammatory mediators, such as TNF-Î± and inducible nitric oxide synthase [30].