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Sicily
Italy
Phenylalanine Hydroxylase
Homocysteine
Methylenetetrahydrofolate Reductase (NADPH2)
Transcobalamins
Apolipoprotein E4
Vitamin B 12
Folic Acid
Apolipoproteins E
Nuclear Proteins
5-Methyltetrahydrofolate-Homocysteine S-Methyltransferase
Genotype
Mutation
Alzheimer's Disease
Phenylketonurias
Down's Syndrome
Mental Retardation
Alleles
Gene Frequency
Co-Publications
20
16
15
13
12
11
10
7
6
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