Protein extracts were separated by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) on 7.5%–16% gradient gels and transferred by semi-dry blotting to Hybond ECL nitrocellulose membranes (GE Healthcare). The following primary antibodies were used to develop the blots: anti-MK2, anti-p38, anti-pT180/Y182-p38, anti-pT334-MK2, anti-p(S/T)-PKD-substrate, anti-Hsp27, anti-pS82-Hsp27 (all purchased from Cell Signaling), anti-GAPDH (Millipore), anti-eEF2, anti-GFP, anti-hRRP40 (all from Santa Cruz Biotechnology), anti-RBM7, anti-ZCCHC8 (both from Atlas antibodies), anti-pS136-Rbm7 (see above); anti-NOGO-B (Rousseau et al. 2005 (link)), and anti-CBP80 (Andersen et al. 2013 (link)) antibody were described before. The anti-FLAG (M2) antibody was purchased from Agilent. ECL detection was carried out on a chemo-luminescence detector (LAS 3000 FujiFilm).