Biomedical Engineering Reference
In-Depth Information
Figure 4.5
The most common antibody molecule is a complex combination
of two identical light and two identical heavy chains, held together by
weak bonds formed by sulfur-containing amino acids. The four variable
regions form the antigen binding site; the constant regions allow the
antibodies to trigger the cell-damaging complement cascade and signal
phagocytic cells to engulf and break down invading microbes.
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