For insoluble protein extraction and analysis, Acetone/TCA precipi- tation protocol was used (Fic et al., 2010). Briefly, insoluble proteins were homogenizing with 70% formic acid (Thermo Fisher Scientific, Rockford, IL), followed by centrifugation at 100,000 ×g for 1 h. Super- natant was collected and the formic acid of the supernatant was neu- tralized using the following ration (1 volumen of sample, 1 volumen of neutralization buffer and 1.8 volumenes 10 N of NaOH). Then, each volumen of sample was mixed with 10 volumenes of cold 10% TCA (Trichloroacetic acid; Thermo Fisher Scientific) in Acetone (Thermo Fisher Scientific) at −20 °C overnight. Next, samples were centrifugated at 15,000 ×g for 10 min and the supernatant was removed. Then, cold acetone was added and incubated at −20 °C for 10 min. After that, samples were centrifugated at 15,000 ×g for 15 min. Supernatant was removed and the pellet was air-dried. The pellet was re-solubilized in T-per (Thermo Fisher Scientific) extraction buffer (150 mg/ml), com- plemented with a protease inhibitor (Complete Mini Protease InhibitorTablets, Roche Diagnostics GmbH) and phosphatase inhibitor (5 mmol/l, Sigma-Aldrich).