8 mgs. of protein extract from SH-SY5Y cells were loaded on a Superose 6 column for size-exclusion chromatography. After fractionation, 20 µl of the collected fractions (500 µl) were analyzed by SDS-PAGE and Western blot using antibodies against the UBE3A, HERC2, NEURL4, PSMD4 and PSMA5. 20 µg of protein extract were loaded as input. The position where the peaks of protein standards eluted (669, 443, 200, 150, 66 and 29 kDa) and the void volume (V) are indicated over the fractions number.