ENO2 and autism: Ratios for STEP 66 kDa/β-actin (P <0.023, d = −1.51), STEP 66 kDa/NSE (P <0.018, d = −1.59), STEP 33 kDa/β-actin (P <0.024, d = −1.63) and STEP 33 kDa/NSE (P <0.020, d = −1.68) were significantly reduced in the cerebellar vermis of adults with autism (Figures 1 and 3, Table 2).