Proteins which transport sugars out of cells have been identified. These proteins are called SWEETs. Each SWEET has seven coiled, cylindrical regions which together make up a pore through the cell surface membrane bilayer, as shown in the diagram.
What describes each of the seven coiled regions (1-7) of a SWEET shown in the diagram?
1 )
primary structure held in its shape by bonds such as hydrogen bonds
2 )
primary structure held in its shape by peptide bonds
secondary structure held in its shape by bonds such as hydrogen bonds
4 )
secondary structure held in its shape by peptide bonds
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