Examlex
Part of immunoglobulin molecules can be changed in order to bind to a variety of antigens while the amino acid sequence of another part does not change.
Lice
Lice are parasitic insects that infest human hair and feed on extremely small amounts of blood drawn from the scalp.
Mites
Small arachnids that are often parasitic, affecting plants, animals, and humans.
Named
Specifically identified or given a particular title or name.
Shape
The external form, contours, or outline of someone or something.
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