Antibody Name	Source	Identifier	Working dilution
RPA194	Santa Cruz	sc-48385 AF488	1:200
RPA194–488	Santa Cruz	sc-48385	1:200
NPM1–488	Thermo Fisher	MA3–25200-A488	1:400
Fibrillarin	Abcam	ab5821	1:300
Fibrillarin-568	Abcam	ab202540	1:300
RRP1B	Sigma	HPA017893	1:100
SURF6	Thermo Fisher	PA5–54841	1:100
Nat10	Thermofisher	13365–1-AP	1:100
ESF1	proteinTech	23496–1-AP	1:100
EXOSCIO	Sigma-Aldrich	HPA028484	1:100
Nucleolin	ThermoFisher	39–6400	1:100
DDX21	Sigma-Aldrich	HPA036593	1:100