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4 protocols using criterion sds polyacrylamide gels

1

Western Blot Analysis of Protein Modifications

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Western blotting was performed after electrophoresis on Criterion SDS polyacrylamide gels (BioRad, Hercules, CA) and transfer to nitrocellulose membranes. Antibodies used were: rabbit anti-succinyllysine (PTM Biolabs), anti-malonyllysine (PTM Biolabs), anti-acyl-CoA oxidase-1 (ACOX1; Abcam), anti-enoyl-CoA hydratase/3-hydroxyacyl-CoA dehydrogenase (EHHADH; Abcam), and anti-β-actin (Proteintech). After incubation with HRP-conjugated secondary antibodies (1:5000) blots were visualized with chemiluminescence. In some experiments the blots were scanned and subjected to densitometric analysis using ImageJ software.
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2

Mitochondrial Protein Immunoblotting

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Aliquots of total liver or heart mitochondrial protein were electrophoresed on Criterion SDS polyacrylamide gels (BioRad, Hercules, CA) and transferred to nitrocellulose membranes. Primary antibodies used for immunoblotting were: anti-TFPα (Abcam, 1:1000), TFPβ (Santa Cruz, 1:250), anti-SCHAD (Abcam, 1:2000), anti-acetyllysine (Cell Signaling, 1:1000), anti-succinyllysine (PTM Biolabs, 1:1000) and anti-heat shock protein-60 (Hsp60, Cell Signaling, 1:2000) as a mitochondrial marker for loading control. After incubation with HRP-conjugated secondary antibodies (1:5000) blots were visualized with chemiluminescence. The blots were scanned and subjected to densitometric analysis using ImageJ software, normalized to either Hsp60 or to Ponceau S membrane staining.
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3

Western Blot Analysis of Mitochondrial Proteins

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Western blotting was executed according to well-established procedures in our laboratory [43 (link), 83 (link), 46 (link), 65 (link), 44 (link), 35 (link)]. Equal amounts of mitochondrial or cytosolic protein per lane were electrophoresed on Criterion SDS-polyacrylamide gels (Bio-Rad) and transferred to polyvinylidene difluoride membranes (Millipore). After blocking, samples were probed with primary antibodies against cyclophilin D (CypD; AbCam, 1:12,000, 5 μg), SIRT3 (1:12,000, 5 μg), acetylated-lysine (1:1,000, 20 μg), LC3B (1:1,000, 20 μg), and Drp1 (Santa Cruz, 1:1,000, 20 μg). Proteins were visualized using enhanced chemiluminescence (GE Amersham) and densitometry performed using ImageJ. SYPRO Ruby staining (Invitrogen, Grand Island, NY) of the membrane was performed and visually inspected for consistency of protein loading [70 (link)]. All antibodies were purchased from Cell Signaling unless otherwise specified. Groups studied for western blotting were adult sham (n=3), adult I/R (n=5), MO OVX sham (n=4), and MO OVX I/R (n=6).
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4

Western Blot Analysis of Sirt2 and Other Proteins

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Tissue lysates in buffer containing 0.05% NP-40, 50 mM NaCl, 0.5 mM EDTA, 50 mM Tris-HCl (pH 7.4), and 10 mM NAM with 1X EDTA-free protease inhibitors (Roche Life Sciences, Basel, Switzerland) were electrophoresed on Criterion SDS polyacrylamide gels (Bio-Rad, Hercules, CA, USA) and transferred to nitrocellulose membranes. The primary antibodies used were anti-Sirt2 (ab67299; Abcam), anti-GAPDH (G8795; Sigma-Aldrich, St. Louis, MO, USA), anti-c-MYC (Cat # 5605; Cell Signaling, Danvers, MA, USA), anti-Alpha tubulin (Cat # 66031-1-Ig, Proteintech, Rosemont, IL, USA), and anti-Lamin A/C (Cat # 10298-1-AP; Proteintech). After incubation with 1:10,000 Goat anti-Rabbit-HRP IgG (STAR208P; Bio-Rad) or Goat anti-Mouse-HRP IgG secondary antibody (STAR207P; Bio-Rad), the blots were visualized with Clarity Max ECL (BioRad), scanned, and in some cases subjected to densitometric analysis using ImageJ software.
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