Protein Structure
Marfan's syndrome is thought to be a mutation affecting

metabolism of homogentisic acid
collagen synthesis
insufficient thyroid production
hemoglobin synthesis

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Protein Structure
Cyclins are proteins that

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

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Protein Structure
Metastasis involves

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

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