Pan-immunity of DSs in AS. (A) The number of different DSs in nearly identical MAGs, encompassing all possible ANI ≥ 95% MAG pairs (n = 329). The y-axis is the proportion of MAG pairs with the corresponding number of DS differences to the total number of MAG pairs. (B) Composition of DSs in MAGs annotated as Thauera aminoaromatica according to GTDB (n = 15, ANI ≥ 95%), with the phylogenetic tree of MAGs on the left. (C) Consensus strains (n = 59) of T. aminoaromatica constructed from metagenomic data using StrainPhlAn, with labels colored by year.