The protease sensitivity assay using bacterially purified AtHYL1FL and AtHYL1N terminal was performed according to previous reports [35 (link),36 (link)]. The samples were loaded on 12–15% SDS-PAGE, and the protein bands were visualized using Coomassie Brilliant Blue (CBB) staining. The Western blotting of the same experiment setup was further used to analyze by anti-AtHYL1 antibody (5:10,000) (AS06136, Agrisera, Vannas, Sweden), according to the report described earlier [37 (link)].
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