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Anti human 4e bp1

Manufactured by Cell Signaling Technology
Sourced in United States

Anti-human 4E-BP1 is a laboratory reagent used to detect and quantify the expression of the 4E-BP1 protein in human samples. 4E-BP1 is a regulator of protein synthesis and plays a role in cellular growth and proliferation.

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3 protocols using anti human 4e bp1

1

Quantifying PI3K-AKT-mTOR Signaling

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Example 4

Western Blotting of Components of the PI3K-AKT-mTOR Signaling Pathway

Primary antibodies used to measure PI3K-AKT-mTOR signaling were anti-human phospho-AKT (Ser 473) (clone: 193H12), anti-human AKT, anti-human phospho-4E-BP1 (Thr37/46), anti-human 4E-BP1, anti-human phospho-S6 ribosomal protein (Ser235/236) (clone: 2F9), and anti-human S6 ribosomal protein (clone: 54D2) (Cell Signaling; Beverly, Mass.). Secondary antibodies used were Peroxidase-AffiniPure F(ab′)2 Fragment Goat anti-Rabbit IgG, F(ab′)2 Fragment Specific, and Peroxidase-AffiniPure F(ab′)2 Fragment Goat anti-Mouse IgG, Fcγ Fragment Specific (Jackson ImmunoResearch, West Grove, Pa.). Western blots were developed using SuperSignal West Pico Luminol Enhancer Solution (Thermo Scientific; Rockford, Ill.) chemiluminescent substrate and visualized following exposure to film.

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2

PI3K-AKT-mTOR Pathway Profiling

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Example 4

Western Blotting of Components of the PI3K-AKT-mTOR Signaling Pathway

Primary antibodies used to measure PI3K-AKT-mTOR signaling were anti-human phospho-AKT (Ser 473) (clone: 193H12), anti-human AKT, anti-human phospho-4E-BP1 (Thr37/46), anti-human 4E-BP1, anti-human phospho-S6 ribosomal protein (Ser235/236) (clone: 2F9), and anti-human S6 ribosomal protein (clone: 54D2) (Cell Signaling; Beverly, Mass.). Secondary antibodies used were Peroxidase-AffiniPure F(ab′)2 Fragment Goat anti-Rabbit IgG, F(ab′)2 Fragment Specific, and Peroxidase-AffiniPure F(ab′)2 Fragment Goat anti-Mouse IgG, Fcγ Fragment Specific (Jackson ImmunoResearch, West Grove, Pa.). Western blots were developed using SuperSignal West Pico Luminol Enhancer Solution (Thermo Scientific; Rockford, Ill.) chemiluminescent substrate and visualized following exposure to film.

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3

Protein Expression Analysis by Western Blot

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Cells were lysed with lysis buffer containing 50 mM Tris-HCl, 1% sodium dodecyl sulfate, 1 mM dithiothreitol and 0.43 mM 4-(2-Aminoethyl) benzenesulfonyl fluoride hydrochloride. The lysates were sonicated and centrifuged at 20,400× g at 4 °C for 20 min, and the supernatant was collected. Equal amounts of the protein extract were subjected to sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and transferred to a polyvinylidene difluoride membrane (EMD Millipore, Billerica, MA, USA). The following were used as the primary antibodies: rabbit anti-human S6K (#2708), phospho-S6K (Thr389) (#9234), anti-human 4E-BP1 (#9644), phospho-4E-BP1 (Ser65) (#9451), ATF4 (#11815), ASCT2 (#8057), phospho-eIF2α (Ser51) (#9721), eIF2α (#9722) antibodies (Cell Signaling Technology, Inc., Danvers, MA, USA), mouse anti-human β-actin antibody (A5441; Sigma), mouse anti-human ASNS antibody (G-10; Santa Cruz Biotechnology, Santa Cruz, CA), rabbit anti-human GPT2 (16757-1-AP) antibody (Proteintech Group, Inc., Chicago, IL, USA), rabbit anti-human Glutaminase (ab156876) and xCT(ab37185) antibodies (Abcam, Cambridge, UK). Signals were detected with Chemi-Lumi One L (Nacalai Tesque, Kyoto, Japan) or Immobilon Western Chemiluminescent HRP Substrate (EMD Millipore). All experiments shown were replicated at least twice.
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