Comparison of the sequences of orfK, the orfK-orfJ intergenic sequence, and the beginning of the orfJ gene of ICEs found in S. parasanguinis NCFD2020, S. macedonicus 33MO, and S. salivarius F1-4 with those of S. thermophilus ICESt3 (Fig. S1); phylogenetic BioNJ tree obtained for integrases of ICEs belonging to the ICESt3 subfamily (Fig. S2).
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