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2 protocols using akt 40d4

1

Activation of T cell signaling

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Feeder-expanded T cells were starved for 4 h in PBS/0.5% human serum. Samples were placed on ice and PHA stimulation mix was added still on ice. Samples were placed on a 37 °C thermoshaker and at the indicated time points, ice-cold PBS was added and respective samples were placed on ice immediately. Cells were then lysed in RIPA buffer as above, and resolved by SDS-PAGE Western blot. The following primary antibodies were used: HSP90 (F-8, Santa Cruz), AKT (40D4, Cell Signaling), phospho-AKT (Ser473, D94, Cell Signaling), ERK1/2 (137F5, Cell Signaling), phospho-ERK1/2 (Thr202/Tyr204, Cell Signaling).
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2

Western Blot Analysis of Signaling Proteins

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Cells were lysed using protein lysis buffer (Sigma) with protease and phosphatase inhibitor cocktails (Sigma). Protein concentration was determined using a BCA protein assay kit (Pierce). 15-20μg of protein was separated on a 4-12% Bis-Tris gel (Life Technologies) and transferred to PVDF membranes. Protein expression was detected by Western blotting using the following primary antibodies against: S6 (54D2, Cell Signalling), p-S6 (Ser235/236) (2211, Cell Signalling), Erk1/2 (3A7, Cell Signalling), p-Erk1/2 (Thr202/Tyr204) (9101, Cell Signalling), Akt (40D4, Cell Signalling), p-Akt (Ser473) (D9E, Cell Signalling), and Vinculin (VIN-11-5, Sigma). Primary antibodies were detected with HRP-conjugated anti-rabbit or anti-mouse IgG and visualised with Immobilon Western HRP substrate (Merck).
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