A) AlexaFluor488-tagged (green) hnRNPA2 LC undergoes LLPS, while AlexaFluor555-tagged (red) TOG D1 does not. However, TOG D1 partitions into hnRNPA2 LC droplets when mixed at a 1:1 ratio. Conditions: 20 µM indicated protein (~1% fluorescently tagged), 20 mM MES pH 5.5, 50 mM NaCl, 150 mM urea. Scale bar: 10 µm. hnRNPA2 LC control duplicated from Figure 1A as hnRNPF PLD and TOG D1 samples were made concurrently. B) Similar to hnRNPF PLD, AlexaFluor555-tagged TOG D1 does not undergo LLPS at 300 µM or partition into AlexaFluor488-tagged FUS LC droplets with both proteins at 300 µM. Conditions: 300 µM proteins (~1% fluorescently tagged), 20 mM MES pH 5.5 150 mM NaCl, 150 mM urea. Scale bar: 10 µm. 