Proteins were separated on SDS–Page in a Mini Protean apparatus (Bio-Rad, Hercules, CA, USA) [54 (link)] and then electroblotted on PVDF membrane with the Trans–Blot Turbo Transfer System (Bio-Rad, Hercules, CA, USA), according to the manufacturer’s instructions. Anti-STRP [7 (link)] 1:10,000, anti-actin (Agrisera, Vännäs, Sweden) 1:5000, and anti-GFP (Santa Cruz Biotechnology, Inc., Heidelberg, Germany, DE) 1:1000 dilutions were used. Protein detections were performed by incubating the membrane with horseradish peroxidase–conjugated anti-rabbit secondary antibody (1:5000) or anti-mouse secondary antibody (1:5000) from Bio-Rad.
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