Proteins

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Clues

A polypeptide with fewer than 50 amino acids
This level of structure results from the bonding of 2 or more subunits
A function of proteins= carrying materials and controlling movement into and out of a cell
A function of proteins= motor and contractile proteins move cells or molecules within them
The third level of protein folding
This type of bond forms between H atoms and the carbonyl group in the peptide-bonded backbone
Biological catalyst which speeds up chemical reactions
This is a chain of amino acids linked by peptide bonds
These are the building blocks of proteins
A function of proteins= conveying signals between cells
A function of proteins= define cell shape and comprise body structures
This level of protein folding forms @-helices and β-pleated sheets
Polypeptides containing more than 50 amino acids
A function of proteins= antibodies and complement proteins attack pathogens
The level of protein folding that results as a unique sequence of amino acids