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Secondary structures for the 5′ UTR of the prototype PEDV CV777 strain. Four conserved stem-loops (SLs) are predicted using Mfold [http://www.unafold.org/mfold/applications/rna-folding-form.php (accessed on 26 May 2022)], and Gibbs free energy for each SL was calculated and presented in kcal/mol.
