Primary and secondary antibodies were prepared in blocking buffer.
Primary antibodies: Mouse anti-FLAG (1:1000; Sigma F1804); Rabbit anti-MATR3 (1:4000; Abcam ab151714); Mouse anti-V5 (1:1000; Invitrogen R960-25); Mouse anti- α tubulin (1:8000; Sigma T5168)
Secondary antibodies: Goat anti-mouse Dylight 680 (1:10000; LI-COR 925-68070); Goat anti-rabbit Dylight 680 (1:10000; Invitrogen 35568); Goat anti-mouse Dylight 800 (1:10000; Invitrogen SA5-10176); Goat anti-rabbit Dylight 800 (1:10000; Invitrogen SA5-35571)