4GUQ:
reference: Transactivation specificity is conserved among p53 family proteins and depends on a response element sequence code., Ciribilli Y, Monti P, Bisio A, Nguyen HT, Ethayathulla AS, Ramos A, Foggetti G, Menichini P, Menendez D, Resnick MA, Viadiu H, Fronza G, Inga A, Nucleic Acids Res. 2013 Jul 26. PMID: 23892287

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