Fig. 5From: High diversity in the regulatory region of Shiga toxin encoding bacteriophagesSequence alignment of Clade I-VII Stx phage CI sequences. CI protein from Clade VIII is not included in the alignment due to large structural differences (see Fig. 4). Red boxes indicate the six amino acids that were conserved throughout all clades and the black arrow indicates the CI autocleavage residue found in this type of repressors [21]Back to article page