Fig. (2) Multiple alignment of the YheA, YmcA and YlbF proteins.The conserved amino acids (>80%) within the sequences are indicated in red. A. YheA proteins, B. YmcA proteins and C. YlbF proteins, where the cysteine-rich domain is located at C-terminal part. The YheA orthologs identified have the following GenBank accession numbers: ABD21907.1 (Sa: Staphylococcus aureus USA300 FPR3757), NP_388861.1 (Bs: Bacillus subtilis), WP_002833772.1 (Pp: Pediococcus pentosaceus), AQY71882.1 (Lp: Lactobacillus plantarum), ARB01090.1 (Lf: Lactobacillus fermentum), WP_068223581.1 (Lb: Lactobacillus backii), ARR89743.1 (Lm: Leuconostoc mesenteroides subsp. mesenteroides), ASX15462.1 (La: Lactobacillus acidophilus), ABN44859.1 (Sa: Streptococcus sanguinis), AOG58335.1 (Sp: Streptococcus pneumoniae), ALR79572.1 (Ss: Streptococcus salivarius), AMF85656.1 (Sm: Streptococcus mutans), APG66667.1 (Ld: Lactobacillus delbrueckii subsp. Lactis), EPH95372.1 (Ef: Enterococcus faecalis), WP_003729622.1 (Lm: Listeria monocytogenes), ASF17835.1 (Ss: Staphylococcus saprophyticus), AJH34205.1 (Ba: Bacillus anthracis), BAB04868.1 (Bh: Bacillus halodurans), BAC13092.1 (Oi: Oceanobacillus iheyensis), ACB60162.1 (Es: Exiguobacterium sibiricum), AOV06873.1 (Ls: Lysinibacillus sphaericus) and BAD74925.1 (Gk: Geobacillus kaustophilus). For YmcA proteins: ABD21673.1 (Staphylococcus aureus USA300 FPR3757), NP_389584.1 (Bacillus subtilis), ARS63477.1 (Streptococcus mutans), WP_011836121.1 (Lactobacillus delbrueckii subsp. Lactis), WP_016623786.1 (Enterococcus faecalis), EFR84635.1 (Listeria monocytogenes), WP_002483425.1 (Staphylococcus saprophyticus), WP_000870462.1 (Bacillus anthracis), WP_010898525.1 (Bacillus halodurans), WP_011066029.1 (Oceanobacillus iheyensis), ACB60523.1 (Exiguobacterium sibiricum), WP_010858552.1 (Lysinibacillus sphaericus) and WP_044731661.1 (Geobacillus kaustophilus). For YlbF proteins: ABD20633.1 (Staphylococcus aureus USA300 FPR3757), NP_389382.1 (Bacillus subtilis), WP_002298033.1 (Streptococcus mutans), WP_064973459.1 (Lactobacillus delbrueckii subsp. Lactis), WP_061101306.1 (Enterococcus faecalis), WP_031674748.1 (Listeria monocytogenes), WP_069822494.1 (Staphylococcus saprophyticus), WP_047423599.1 (Bacillus anthracis), WP_010898747.1 (Bacillus halodurans), WP_011065849.1 (Oceanobacillus iheyensis), WP_012370848.1 (Exiguobacterium sibiricum), WP_010858307.1 (Lysinibacillus sphaericus) and WP_044733207.1 (Geobacillus kaustophilus).