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2 protocols using anti α1 antitrypsin

1

ER Stress Protein Regulation Analysis

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The following chemicals were used: thapsigargin (MP Biomedicals, Santa Ana, CA), tunicamycin and
kifunensine (Calbiochem, Billerica, MA), puromycin (InvivoGen, San Diego, CA), and bafilomycin A1,
MG-132, and DTT (Sigma-Aldrich, St. Louis, MO). For Western blot analyses, the following antibodies
were used: anti-FLAG M1 and anti-tubulin (Sigma-Aldrich), anti–α1-antitrypsin (Dako,
Glostrup, Denmark), anti–14-3-3z and anti-SEL1L (Santa Cruz Biotechnology, Dallas, TX),
anti–S-tag and anti–OS-9 (Abcam, Cambridge, England), anti–GRP94 9G10 and
anti-KDEL (Enzo, Farmingdale, NY), anti-GRP94 (provided by Ineke Braakman, Utrecht University,
Utrecht, Netherlands), anti-HA (Covance, Princeton, NJ), anti-BiP (BD Biosciences, San Jose, CA),
and anti-PERK and anti-JNK (Cell Signaling Technologies, Danvers, MA). Secondary antibodies were
obtained from LI-COR (IRDye 680 and 800 nm, for use with the LI-COR Odyssey system [Lincoln, NE])
and Santa Cruz Biotechnology (horseradish peroxidase conjugated).
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2

Western Blot Antibody Reagents

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Anti-firefly luciferase (Abcam, Cambridge, UK; ab187340, 1:4000), anti-GAPDH (CST, Danvers, USA; #2118, 1:1000), anti-calnexin (Stressgen, San Diego, USA; SPA-860, 1:1000), anti-Sec61α (Sigma Aldrich, St. Louis, USA; SAB2500917, 1:1000), anti-β-actin (CST, #4970, 1:1000), anti-FLAG M2 (Sigma Aldrich, St. Louis, USA; F1804, 1:1000), anti-α-1antitrypsin (DAKO, Glostrup, Denmark; A0012, 1:1000), anti-IRE1α (CST, #3294, 1:1000), anti-PERK (CST, #3192, 1:500), anti-CHOP (CST, #2895T, 1:500), anti-IgG (H+L chain) (Rabbit) pAb-horseradish peroxidase (HRP) (MBL, Tokyo, Japan; 458, 1:5000), peroxidase AffiniPure goat anti-mouse IgG (H+L) (Jackson Immuno Research Laboratories, West Grove, USA; 115-035-003, 1:5000), anti-rabbit IgG, HRP-linked antibody (CST, 7074, 1:3000), and anti-mouse IgG, HRP-linked antibody (CST, 7076, 1:3000) were purchased. Anti-Sec61β (1:1000) was a kind gift from Dr Tom A. Rapoport (Harvard Medical School, Boston, USA). Anti-ERP57 antibody (1:1000) was generated in our laboratory (Sopha et al., 2012) .
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