Antibodies (immunoglobulins) are the guided missiles that B cells make to tag invaders. There are five of them. Remember them with GAMED: G, A, M, E (and D). Click each letter for its job and a memory hook.
The antibody
Every antibody is a Y-shaped protein. Its two arms grab one specific antigen.
Pick an antibody.
Pick an antibodyG · A · M · E · D
What it does
Two big ones to nail:IgG means lonG-term immunity. It is the only one that crosses the placenta (mom → baby). IgM is the Monitor. It is first on the scene in a new infection.