Anti pcna

Cells were lysed with radio immunoprecipitation assay buffer (RIPA) containing 1 mmol/L PMSF (Solarbio, China). Protein extractions were separated by 12% SDS-PAGE gels and transferred to polyvinylidene fluoride (PVDF) membranes (Millipore, Germany). The membranes were incubated overnight at 4 °C with primary antibodies specific for anti-β-actin, anti-CDK2, anti-CyclinD1, anti-CyclinE, anti-PCNA, and anti-P53 (1:1,000; Wanleibio), anti-Bcl-2, anti-Bax, anti-Caspase9, anti-FOXC1, and anti-MyoD1 (1:1,000; Abways Technology), anti-MyoG, (1:1,000; Abcam, Cambridge, England). After incubation with secondary antibodies, signals were detected using a chemiluminescence system (Bio-Rad, USA).

Total proteins of bovine fat cells were extracted using radioimmunoprecipitation assay buffer (RIPA) buffer with 1% PMSF (Solarbio, Beijing, China) after transfection for 24 h or induction for 6 days after transfection. The protein concentration was determined by a bicinchoninic acid (BCA) kit (Beyotime, Shanghai, China), a 5× protein loading buffer (containing mercaptoethanol) was added to proteins at a ratio of 1:4, and then the sample was heated in boiling water for 3–5 min. Proteins were then separated by SDS-polyacrylamide gel electrophoresis and subsequently transferred to nitrocellulose membranes and blocked with milk powder solution for 2 h at room temperature. The membranes were then incubated overnight with the primary antibody of anti-CDK2, anti-PCNA, anti-PPARγ, anti-C/EBPβ, and anti-β-actin (Wanlei Bio, Shenyang, China). The membranes were then washed with PBS-Tween 20 and incubated for 1.5 h with horseradish peroxidase-conjugated secondary antibodies (Boster, Pleasanton, CA, USA). Finally, the membranes were imaged with an enhanced chemiluminescence (ECL) kit (Solarbio, Beijing, China) and quantified with the ImageJ program (Bio-Rad, USA).

Total proteins of bovine myoblasts were prepared with radio immunoprecipitation assay (RIPA) lysis buffer (Solarbio, Beijing, China). Proteins were fractionated on 12% SDS-PAGE gels and transferred to polyvinylidene difluoride (PVDF) membranes (Thermo Fisher Scientific). Blots were incubated overnight with primary antibodies specific for anti-CyclinD1 (#ab226977), anti-glyceraldehyde-3-phosphate dehydrogenase (GAPDH, #ab9485), anti-MyoD (#ab16148) (Abcam, Cambridge, UK), anti-INSR (#WL02857), anti-PCNA (#WL01804), anti-CDK2 (#WL01543), anti-CyclinE (#WL01072), anti-Bcl-2 (#WL01556), anti-P53 (#WL01919), anti-P21 (#WL0362), anti-MyoG (#WL01132), anti-MyHC (#WL02785), and anti-Bax (#WL01637) (Wanleibio, Haerbin, China) at 4°C. After incubation with secondary antibodies, the membranes were quantified with the ChemiDoc XRS system (Bio-Rad, Hercules, CA, USA).