Extended Data Fig. 1: Prevalence of B. fragilis-specific orphan immunity genes in adult and infant microbiomes.
From: Human gut bacteria contain acquired interbacterial defence systems
a, Number of adult human gut microbiome samples in which the indicated immunity genes (1–14, GA3_i1–14 from ref. 8) can be detected at an 80% nucleotide identity threshold and an abundance more than tenfold that of B. fragilis marker genes. Bars coloured as in Fig. 1a, and asterisks indicate immunity genes without orphan representation. b, Comparison of abundance of B. fragilis-specific T6SS immunity genes with B. fragilis species-specific marker genes in infant microbiome samples16 (Supplementary Table 4). Abundances are calculated as in Fig. 1a. Samples in which immunity gene abundance exceeds that of Bacteroides by over tenfold (blue) are highlighted.
