Protein Structure
The four subunits of the hemoglobin (Hb) gene represent protein's

primary structure
tertiary structure
secondary structure
quaternary structure

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Protein Structure
Metastasis involves

All of these
metalloprotein levels
decreased levels of proteins that regulate metalloproteins
ability of cells to dissolve cellular matrix

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Protein Structure
Cyclins are proteins that

regulate passage from one stage of cell division to another
regulate ability of cells to invade tissue
None of these
regulate apoptosis of damaged cells

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