Figure 6.

Fragment recruitment diagrams showing hits to Streptococcus parasanguinus acetoin metabolism genes from seven CF sputum microbial metagenomes. The number of hits at each position is shown for (a) the budB small subunit, also known as acetolactate synthase, (b) the budB large subunit, (c) budA or acetolactate decarboxylase, (d) budC or acetoin dehydrogenase, and the acetoin catabolism genes are shown in (e) acoA and (f) acoB. Hits with a BLASTn e-value of 1 × 10⁻¹⁰, 40 bp and 40% identity were retained.