AID is already expressed at postnatal day nine, but does not influence the expression of the candidate genes. Real Time Quantitative PCR shows the relative expression of AIDtg protein A, APP, B, NEP, C, KAI1, D, and p53, Ein the forebrain and hippocampus of AIDtg and their littermate control mice as early as 9 and 18 days post-natal. For APP, NEP, KAI1 and p53 expression, values are relative to 100% value given arbitrarily their day 9 and day 18 littermates. For AIDtg protein, 100% value was assigned to the first day 9 littermate mouse. Experiments were conducted in triplicate loading, and the error bars represent standard deviations.