Table S1.
β-Kdo GTs representatives used in phylogenetic analysis
| No. | Bacteria | Protein | Abbreviation | Amino acid | Domain | GenBank |
| 1 | Raoultella terrigena | WbbB | Rt_WbbB | 401 | 1–401 | AAQ82931 |
| 2 | Klebsiella pneumoniae O12 | WbbB | Kp_WbbB | 398 | 1–398 | BAN08508 |
| 3 | Aeromonas hydrophila O11 | WbbB | Ah_WbbB | 391 | 1–391 | AKL88477 |
| 4 | Serratia marcescens O4 | WbbK | Sm_WbbK | 396 | 1–396 | AAC00183 |
| 5 | Providencia alcalifaciens O36 | WpaF | Pa_WpaF | 409 | AEB61498 | |
| 6 | Cronobacter sakazakii O6 | WepM | Cs_WepM | 413 | AFI60286 | |
| 7 | Actinobacillus pleuropneumoniae 5a | Cps5B | Ap_Cps5B | 526 | AAC26631 | |
| 8 | Escherichia coli K12 | Orf3 | Ec_Orf3 | 537 | AMA19673 | |
| 9 | Escherichia coli K14 | Orf2 | Ec_Orf2 | 476 | 286–761 | AMA19676 |
| 10 | Sinorhizobium meliloti 1021 | RkpZ1 | Sm_RkpZ1 | 432 | CAC48977 | |
| 11 | Sinorhizobium meliloti 1021 | RkpZ2 | Sm_RkpZ2 | 343 | CAC48963 | |
| 12 | Sinorhizobium meliloti 1021 | SM_b20824 | SM_b20824 | 382 | 397–778 | CAC48964 |
| 13 | Sinorhizobium meliloti Rm41 | RkpZ | Sm_RkpZ | 440 | CAB62159 | |
| 14 | E. coli RS218 serogroup K1 | KpsS | Ec_KpsS | 401 | KIE82101 | |
| 15 | E. coli RS218 serogroup K1 | KpsC | Ec_KpsC-N | 302 | 1–302 | KIE82100 |
| 16 | E. coli RS218 serogroup K1 | KpsC | Ec_KpsC-C | 373 | 303–675 | KIE82100 |
| 17 | Neisseria meningitidis | KpsS (LipB) | Nm_KpsS | 419 | AEQ62063 | |
| 18 | Neisseria meningitidis | KpsC (LipA) | Nm_KpsC-N | 326 | 1–326 | AEQ62064 |
| 19 | Neisseria meningitidis | KpsC (LipA) | Nm_KpsC-C | 378 | 328–704 | AEQ62064 |
| 20 | Haemophilus influenzae | KpsS (HcsB) | Hi_KpsS | 406 | AAQ12663 | |
| 21 | Haemophilus influenzae | KpsC (HcsA) | Hi_KpsC-N | 302 | 1–302 | AAQ12662 |
| 22 | Haemophilus influenzae | KpsC (HcsA) | Hi_KpsC-C | 378 | 303–680 | AAQ12662 |
| 23 | Campylobacter jejuni | KpsS | Cj_KpsS | 394 | EIB21594 | |
| 24 | Campylobacter jejuni | KpsC | Cj_KpsC-N | 295 | 1–295 | EIB21593 |
| 25 | Campylobacter jejuni | KpsC | Cj_KpsC-C | 394 | 296–689 | EIB21593 |
| 26 | Cronobacter sakazakii | KpsS | Cs_KpsS | 409 | AFK00904 | |
| 27 | Cronobacter sakazakii | KpsC | Cs_KpsC-N | 304 | 1–304 | AFK00903 |
| 28 | Cronobacter sakazakii | KpsC | Cs_KpsC-C | 374 | 305–678 | AFK00903 |
| 29 | Sinorhizobium fredii USDA 257 | Cps10C | Sf_Cps10C | 510 | AFL51445 | |
| 30 | Burkholderia oklahomensis EO147 | DM82_2445 | Bo_2445 | 398 | AIO67090 | |
| 31 | Neisseria meningitidis serogroup E | CseA | Nm_CseA | 398 | CCP19687 | |
| 32 | Actinobacillus pleuropneumoniae 10 | Cps10C | Ap_Cps10C | 480 | AEB33789 | |
| 33 | Sinorhizobium fredii USDA 205 | N181_28220 | Sf_28220 | 510 | KSV81166 |