While our RNASeq dataset comparing aposymbiotic with symbiotic E. muelleri also show differentially expressed cadherins, caspases, peroxidases, methionine-r-sulfoxide reductase/selenoprotein, and metalloproteinases, the expression differences for this suite of genes was not typically statistically significant at the 24 h post-infection time point (File S2). Here, SELENOS is linked to infection.