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

insufficient thyroid production
hemoglobin synthesis
collagen synthesis
metabolism of homogentisic acid

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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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Protein Structure
Cyclins are proteins that

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

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