Polypeptides are substances whose molecules consist
of three* or more amino
acids linked together by peptide bonds. (Note that the prefix
"poly-" indicates "many", implying a structure consisting
of multiple units attached together.)
For comparison:
-
Two amino acids linked together by a peptide bond form a
dipeptide, whereas
-
Three or more amino acids linked together by a peptide bond
form a polypeptide.
An example of a polypeptide is a protein.
All protein molecules are polypeptides.
More about the Digestive
System:
This section includes pages about:
*
Introduction to the Digestive System
*
Terminology about Digestion
* Passage
through the alimentary tract
* Component Parts of the Digestive System, incl. Teeth,
Stomach,
Liver,
Small
Intestine,
Large Intestine
* Chemical
Processes in the Digestive System (introductory level)
*
Diseases and Disorders of the Digestive System.
For further information see also our pages of
books about gastroenterology. |
 |
This section
is about
Terms
used to describe digestion and digestive processes
To read about other parts of the digestive system, use the links on the
left-side of this page.
See also glossary pages about
Tissues
and Organs of the
Digestive System
and about
Diseases
and Disorders of the Digestive System
|
