Protein Structure
Beta pleated sheets are examples of protein's

quaternary structure
primary structure
tertiary structure
secondary structure

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Protein Structure
Metastasis involves

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

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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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