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2 protocols using pd l1 nbp1 76769

1

Western Blot Protein Detection Protocol

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The protein extracts were subjected to electrophoresis separation, and then the separated protein was electrotransferred to polyvinylidene fluoride membrane which was blocked with 5% bovine serum albumin (BSA) at ambient temperature for 1 hour. Then, the membrane was incubated with diluted primary antibodies: CUL3 (10450, 1/1000; Cell Signaling Technology (CST)), PD-L1 (NBP1-76769, 1/1000; Novus Biologicals), SPOP (16 750–1-AP, 1/1000; Proteintech), Flag-tag (MA1-91878, 1/1000; Sigma), GAPDH (sc-47724, 1/2000; Santa Cruz, internal reference), and HA-tag (sc-7392, 1/1000; Santa Cruz) overnight at 4°C as well as with anti-Mouse-HRP secondary antibody (7076, 1/5000; CST) or anti-Rabbit-HRP secondary antibody (7074, 1/5000; CST) for 1 hour at ambient temperature. Subsequently, the membrane was developed with ECL working solution (EMD Millipore). ImageJ analysis software was run to quantify the gray levels of each group of bands.
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2

Autophagy and PD-L1 Regulation Assay

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RPMI1640 medium (72400) and DMEM medium (10564) are products from Life Technologies. 3-methyladenine (M9281), bafilomycinA1 (B1793), chloroquine (C6628), rapamycin (R0395) and phytohemagglutinin-M (PHA, L8902) are from Sigma-Aldrich. BMS 345541 (S8044) is from Selleck. The following primary antibodies were used: microtubule-associated light chain 3 (LC3B, NB100–2220, Novus Biologicals), LC3A/B (13,082, Cell Signaling), p62/SQSTM1 (H00008878-M01, Novus Biologicals), PD-L1 (NBP1–76769, Novus Biologicals), PD-L1 (59,949, Cell Signaling), PD-L1 (Spring Bio, SP142), ATG5 (12,994, Cell Signaling), ATG7 (SAB4200304, Sigma-Aldrich), β-actin (4967, Cell Signaling), CD45 (368,508, Biolegend), CD8a (301,041, Biolegend), CD4 (357,408, Biolegend), FITC Mouse IgG1(400,110, Biolegend), PD-L1 (329,708, Biolegend), APC Mouse IgG2b (300,907, Biolegend), and 7-AAD (420,404, Biolegend).
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