Figure 3 Respiratory nitrate reduction pathway is specifically
conserved in the Apibacter group, which is also possessed bySnodgrassella . A. Schematic diagram shows that the respiration
nitrate reduction pathway together with molybdate cofactor synthesis are
conserved accoss the Apibacter group (pink arrows), and nitrite
detoxification (grey arrows) is absent in the Apibacter group but
possessed by genomes in Clade C/E (genes distribution are provided in
Dataset S5). B. Genomic regions of type strains of Apibacter fromA. cerana , bumble bee and A. dorsata encodes genes
involved in respiratory nitrate reduction. Vertical grey blocks connect
homologous genes among type strains, with numbers representing the
percentage of sequence similarities. Genes in pink encodes nitrate
reductase and transporter. Genes in blue encodes molybdate cofactor
synthesis. Genes in grey are hypothetical genes or genes that are not
directly related.