Stepwise multi-polyubiquitantion of p53 by the E6AP-E6 ubiquitin ligase complex — Stepwise multi-polyubiquitantion of p53 by E6AP-E6 — Stepwise multipolyubiquitination of p53 by the E6AP-E6 ubiquitin ligase complex — EDITORS' PICK: Stepwise multipolyubiquitination of p53