Protein Structure
Individuals with PKU disease are mentally retarded unless

tyrosine in the diet is restricted
homogentisic acid in the diet is restricted
phenylalanine in the diet is restricted
None of these

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Protein Structure
Cyclins are proteins that

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

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Protein Structure
Metastasis involves

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

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