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. 2020 Jan 4;11(1):73–94. doi: 10.1007/s13167-019-00197-8

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© The Author(s) 2020

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Fig. 4 — Protein–protein interaction (PPI) network in human LSCCs. Red node means the increased ubiquitination level in LSCCs. Green node means the decreased ubiquitination level in LSCCs. Yellow node means multiple ubiquitination sites in a protein with reverse (some increased and some decreased) ubiquitination levels in LSCCs