Peptides are short polymers of amino acid monomers linked by peptide bonds. They are distinguished from proteins on the basis of size, typically containing less than 50 monomer units. The size boundaries which distinguish peptides, polypeptides, and proteins are arbitrary. Long peptides such as amyloid beta can be considered proteins, whereas small proteins such as insulin can be considered peptides.
19:47, 15 December 2011
The opening between the nasal cavity and the pharynx.
The smallest structural units of living matter capable of ...
The opening in a vertebra through which the spinal cord ...
A thin fold of skin, that covers and protects the eye.
The human circulatory system consisting of the heart and ...
kidney-bean shaped
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