This project uses fractal dimension of mRNA and coding DNA sequences (CDS) to probe the lncRNAs within the mRNAs (but not the CDS) in Alzheimer's disease genes, namely, APP or AD1, APOE or AD2, PSEN1 or AD3, and PSEN2 or AD4. The gene discussed is PSEN1; the disease is early-onset autosomal dominant Alzheimer disease.