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2 protocols using ab90867

1

Alveolar Macrophage Protein Isolation

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For protein isolation, alveolar macrophages were washed twice with ice cold PBS and lysed with RIPA buffer (50 mM Tris·HCl, pH 7.5, 150 mM NaCl, 1% Nonidet P-40, 0.5% sodium deoxycholate and 0.1% SDS). Samples were centrifuged to remove cell debris and protein concentrations were determined using standard Bradford assays. In all, 10 μg of protein lysates were separated on 10% SDS-PAGE and blotted onto polyvinylidene difluoride membranes (162–0177, Bio-Rad, Hercules, CA, USA). The following antibodies were used: LMP2 (ab3328, Abcam, Cambridge, UK), LMP7 (ab3329, Abcam), 20S α1+2+3+5+6+7 (hereafter called α1–7; clone MCP231, ab2267, Abcam), Psmb5 (detecting β5, ab90867, Abcam), AKT (4685, Cell Signaling, Beverly, MA, USA), p-AKT (4060, pSer473, Cell Signaling), STAT6 (9362, Cell Signaling), p-STAT6 (9361, pTyr641, Cell Signaling), IRF4 (M17, Santa Cruz, Dallas, TX, USA), Arginase 1 (H-52, Santa Cruz), iNOS (610331, BD Transduction Laboratories, Franklin Lakes, NJ, USA), IL4R (ab157162, Abcam), HRP-conjugated anti-β-actin (Sigma-Aldrich), HRP-conjugated anti-rabbit (Abcam) and anti-goat antibodies (Santa Cruz).
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2

Proteasome Subunit Quantification by Western Blot

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Proteins were transferred to PVDF membranes using a Bio-Rad mini-protean transfer system containing a buffer of 25 mM Tris base, 192 mM glycine, 0.1% SDS. Proteins were transferred for 6h at 40V at 4°C. Membranes with transferred proteins were blocked with a 1:1 mixture of Li-COR blocking buffer and PBS. Membranes were then incubated in blocking solution for 1 h and primary Abs (1:1000) applied for 16 h at 4°C. Membranes were washed and incubated with secondary Abs (IR Dye® 800CW goat anti-mouse IgG (H+L) or IR Dye 680CW donkey anti-rabbit IgG (H+L), and imaged using an Odyssey Li-Cor platform. Antibodies used were rabbit anti-PSMB5 polyclonal (Abcam, ab90867), rabbit monoclonal to anti-PSME1 (EPR10967, Abcam, ab155091), rabbit monoclonal to anti-PSME2 (EPR14931, Abcam, ab183727), rabbit anti-LMP2 polyclonal (PSMB9, Abcam, ab42987), rabbit anti-PSMB10 polyclonal (Abcam, ab77735), rabbit anti-LMP7 monoclonal (EPR14482, PSMB8, Abcam, ab180606), rabbit anti-PSMA6 polyclonal (Cell Signaling 2459), rabbit anti-PSMB1 polyclonal (Abcam, ab196623), rabbit anti-PSMB2 polyclonal (Abcam, ab140426), mouse anti-Rpn5 monoclonal (PSMD12, clone H3, Santa Cruz Biotechnology, sc-398279), mouse anti-α-tubulin monoclonal (DM1a, Abcam, ab7291), and rabbit anti-histone 3 polyclonal (Abcam, ab1791).
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