Protein Structure
Over 50% of common cancers are associated with damage to a protein, p53. This protein

is an oncogene
is a cyclin
is a tumor supressor
regulates apoptosis

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Protein Structure
Cyclins are proteins that

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

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Protein Structure
Metastasis involves

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

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