![](http://www.alamy.com/thumbs/6/4A56FFF0-C984-4129-AD22-5F0C266B7883/G593DD.jpg)
Antibody Immunoglobulin G (IgG) is a Y-shaped protein and part of the human immune system
Antibody Immunoglobulin G (IgG) is a Y-shaped protein and part of the human immune system. The antibody binds to antigen (foreign particles that enter the body).
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