Fig. 1

Percentage occurrence of putative AI-2 LuxS-based quorum sensing proteins in the genomes of Gram-positive and Gram-negative rumen bacteria [13]. a Proportional representation of LuxS and LuxR in the genomes of the Gram-positive and Gram-negative genomes. b Proportional representation of LuxS in the genomes of the Gram-positive and Gram-negative genomes. c Proportional representation of LuxR in the genomes of the Gram-positive and Gram-negative genomes. Numbers in brackets show total number of bacterial genomes in which the corresponding gene was found