(a) Mixtures of recombinant EZH2, FBL and NOP56 proteins with or without BS3 crosslinking were subjected to SDS-PAGE, followed by western blot analysis using their own antibodies to visualize the location of cross-linked species.
(b) Gel band containing cross-linked proteins was subjected to Mass Spectrometry analyses to detect the presence of all three proteins.
(c-f) Densitometric analysis of data from Fig. 4a were shown as distribution proportion of FBL (c)/NOP56 (d)/NOP58 (e)/SNU13 (f) protein in each fraction.
(g) Fractions 17–19 and 27–29 from control C4–2 cell nuclear extracts were subjected to co-IP assay using anti-EZH2 antibody.
The assays in a-b and g have been performed three times with similar results. Statistical source data and unprocessed blots are provided in Source data Extended data Fig. 4.