Complement component 3, often called C3, is an essential protein of the immune system. This protein plays a vital role in the body’s innate immune system, providing: the first line of defense against ...

A complement C4 (also known as a complement component 4, or simply C4) is a test to measure the level of C4 proteins you have in your blood. These proteins play a role in how your immune system ...

Complement cascade is made up of about 30 proteins that cleave one another in a series of reactions that radiates from an initial binding site on a pathogen. Best known for its action against bacteria ...

Your complement system consists of a group of important proteins in your bloodstream. These proteins help your immune system fight off harmful invaders, such as bacteria, and other foreign substances.

When nanoparticles are intravenously injected into the body, complement proteins deposit on the surface of nanoparticles in a process called opsonization. These proteins prime the particle for removal ...

Complement proteins may be helpful when it comes to rallying clearance of hazardous debris from the brain, but scientists believe the immune activators can also inflict irreparable damage to neurons ...

We all forget things, and sometimes it would be better if we did not. Normal forgetting occurs more frequently as we age, but more serious, progressive, retrograde forgetting, which can have severe, ...

Study offers molecular explanation for long-standing observation that certain diseases occur more often or more severely in different sexes. Complement component 4 (C4) genes protect against the ...