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
Cyclins are proteins that

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

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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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