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2 protocols using tubulin

1

Protein Expression Analysis of Cell Lysates

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After desired treatments, cells were lysed with RIPA buffer spiked with a fresh protease and phosphatase cocktail (Thermo Scientific, #78442) and sonicated. Protein concentrations were quantified using the Pierce BCA assay kit (Thermo Fisher, #23225). 80–120μg of protein for each sample was loaded onto SDS-PAGE gels, and then transferred onto PVDF membranes. The blots were incubated with the following antibodies: desmocollin 1 (sc-398590, RRID: AB_2894905), desmoglein 2 (sc-80663, RRID: AB_2093438), plakophilin (sc-33636, RRID: AB_2164139), connexin 26 (sc-7261, RRID: AB_2110895) and cFOS (sc-52, RRID: AB_2106783) from Santa Cruz; ER-α (#8644, RRID: AB_2617128), HA (#3724, RRID: AB_1549585), Non-phospho-β-catenin (#19807, RRID: AB_2650576), Histone H3 (#4499, RRID: AB_10544537), AIF (#5318, RRID: AB_10634755), GSK3β (Ser9, #5558, RRID: AB_10013750), phospho-GSK3α (Ser21, #9316, RRID: AB_659836), GSK3β (#12456, RRID: AB_2636978) and GSK3α (#4337, RRID: AB_10859910) from Cell Signaling Technology; β-catenin (#610154, RRID: AB_397555) from BD; Tubulin (T6557, RRID: AB_477584) and connexin 43 (C6219, RRID: AB_476857) from Sigma Aldrich; and TIMP3 (ab39184, RRID: AB_2204971) from Abcam.
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2

Protein Expression Analysis in Keratinocytes

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SDS-lysed keratinocyte cell lysates were equalized for protein concentration using BioRad reagents. Equal amounts of protein-normalized samples were loaded onto SDS-acrylamide gels, electrophoresed, and transferred onto PVDF membranes. Blots were blocked in 0.05% tween-20/5% Non-fat milk in Tris-buffered saline and probed with the indicated antibodies to GAPDH (#368 from Cell Signaling), Tubulin (#T9026 from BD Biosciences), anti-16E7 (a mix of both monoclonal antibody clones 8C9 and EDV7 from Santa Cruz Biotechnology), and antibodies from ThermoFischer to actin (MS-1295-P1) and p53 (MA1-19055). Anti-AU1 tag monoclonal antibody was a gift of Richard Schlegel (Georgetown University). Anti-16E6 MAb 6G6 was a kind gift of Johannes Schweitzer (Arbor Vita Corp.); lysates for 16E6 western blots were prepared from Igepal-lysed cells as described [45 (link)].
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