Figure 1. Alignment of the LuxS sequences of B. longum NCC2705, B. longum E18, B. bifidum S17, B. breve UCC2003, B. adolescentis L2-32, B. lactis AD011, B. dentium Bd1 and V. harveyi BB170.

Amino acids are color-coded according to their polarity and the degree of conservation amongst the sequences is indicated below the alignment on a black-green scale with black indicating low and green high conservation.