RPS6 and Alzheimer disease: While early AD (MMSE > 20–25) samples had no significant increases in relative transcript levels of four candidate 5′TOP transcripts (RPS6, EIF3E, RPL28, and EIF2S1) compared to control, late AD (MMSE ≤ 20) samples exhibited fivefold or greater increases relative to control in all candidate transcript levels (Fig. 6a).