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3 protocols using tubulin 9f3

1

Western Blot Protein Analysis Protocol

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Cells were washed with ice-cold PBS, harvested by scraping and then homogenized in CelLytic M lysis buffer (Sigma, Merck) supplemented with phosphatase and protease inhibitors (PhosSTOP and cOmplete, Roche). Lysates were incubated (1 hour, 4°C) and then centrifuged at 14,000 × g (10 minutes, 4°C). Protein samples were quantified using the Pierce BCA Protein Assay (Thermo Fisher Scientific), resolved by SDS-PAGE and transferred to polyvinylidene difluoride membranes (Millipore, Merck). Membranes were blocked with Tris-buffered saline/0.5% Tween 20 (TBST, pH 7.5) containing 5% skim milk powder and probed overnight with primary antibodies against the following targets: PSMA (1H8H5, Thermo Fisher Scientific), EGFR (D38B1), HER2 (44E7), HER3 (D22C5), p-AKT(S473) (587F11), p-AKT (T308) (244F9), AKT (D38B1), p-S6 (S235/236) (D57.2.2E), Calnexin (C5C9) and Tubulin (9F3) were from Cell Signaling Technology, AR (Santa Cruz Biotechnology), GAPDH (GT239, GeneTex), and mGluR1 (07-617, Merck). Following incubation with horseradish peroxidase–linked secondary antibodies (Dako, Agilent Technologies), immunoreactive bands were visualized with Pierce ECL Western Blotting Substrate (Thermo Fisher Scientific).
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2

Quantitative Protein Analysis in Frozen Liver

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Frozen liver tissues were homogenized and immunoblotting was performed using rabbit anti-G6PC (custom made) dilution 1:5000 and rabbit anti-PEPCK (H-300) dilution 1:7000 (sc-32879) (Santa Cruz Biotechnology, Dallas, TX, USA) and normalized to the housekeeping gene tubulin (9F3) dilution 1:1000 (2128) (Cell Signaling, Danvers, MA, USA). The primary antibodies were detected with corresponding secondary HRP-conjugated goat anti-rabbit IgG (170-5046) (Biorad, Hercules, CA, USA) antibodies (dilution 1:10,000). The signal was quantified using the software ImageJ.
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3

Comprehensive Protein Expression Analysis

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Cells were washed with ice-cold PBS, harvested by scraping and then homogenized in CelLytic M lysis buffer (Sigma, Merck) supplemented with phosphatase and protease inhibitors (PhosSTOP and cOmplete, Roche, Basel, Switzerland). Lysates were incubated (1 h, 4°C) and then centrifuged at 14,000 x g (10 min, 4°C). Protein samples were quantified using the Pierce BCA Protein Assay (ThermoFisher Scientific), resolved by SDS-PAGE and transferred to PVDF membranes (Millipore, Merck). Membranes were blocked with Tris-buffered saline/0.5% Tween 20 (TBST, pH 7.5) containing 5% skim milk powder and probed overnight with primary antibodies against the following targets: PSMA (1H8H5, ThermoFisher Scientific), EGFR (D38B1), HER2 (44E7), HER3 (D22C5), p-AKT(S473) (587F11), p-AKT (T308) (244F9), AKT (D38B1), p-S6 (S235/236) (D57.2.2E), Calnexin (C5C9) and Tubulin (9F3) were from Cell Signaling Technology, MA, USA, AR (Santa Cruz Biotechnology, TX, USA), GAPDH (GT239, GeneTex, CA, USA) and mGluR1 (07-617, Merck). Following incubation with horseradish peroxidase-linked secondary antibodies (Dako, Agilent Technologies, CA, USA), immunoreactive bands were visualized with Pierce ECL Western Blotting Substrate (ThermoFisher Scientific).
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