It is worth noting that under these conditions STEC strains are immune to infection by Shiga toxin-converting bacteriophages as all bacteria lysogenic with lambdoid phages are resistant to infection by the same phage (due to a strong repression of phage lytic development by the cI repressor, present in large amounts in lysogenic cells) (for the description of the immunity analysis of Shiga toxin-encoding bacteriophages see Allison et al., 2003; for reviews on other lambdoid phages see Ptashne, 2004; Węgrzyn and Węgrzyn, 2005; Łoś et al., 2011; Węgrzyn et al., 2012). Here, NDUFB6 is linked to infection.