globular proteins
Proteins that consist of long
chains of amino acids folded up into complex
shapes. Globular proteins serve as, or form important components of, the
following:
- Enzymes
- Hormones
- Antibodies
- Some structural proteins. (Globular proteins form part of the cell
membrane, which has a structural role as well as a role in transporting
ions in and out the cell)
The structure of globular proteins has been traditionally discussed in terms
of four levels of structure: primary, secondary, tertiary, and quaternary.
Two additional levels are now commonly distinguished: motifs and domains.
Compare with fibrous protein.
Related category
• BIOCHEMISTRY
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