a. Droplet experiments examining ability of MeCP2 condensates to preferentially incorporate and concentrate HP1α compared to BRD4 domains in the presence of naked DNA. BRD4-IDR, bromodomain 1 (BD1), and extra-terminal (ET) domain were examined. MeCP2-GFP at 7.5 μM was mixed with either HP1α-mCherry, BRD4-IDR-mCherry, BRD4-BD1-mCherry, BRD4-ET-mCherry, or mCherry each at 7.5 μM and 160 nM methylated DNA in droplet formation buffers with 150 mM NaCl and 10% PEG-8000.
b. mCherry partition ratios in MeCP2-GFP droplets for experiments in Extended Data Fig. 5a. Fields per condition n=15.