| [B] Acidobacterium capsulatum (strain ATCC 51196 / DSM 11244 / JCM 7670) | ACIC500860 | C1F306 | Xylann 1,4-beta-xylosidase |
| [B] Flavobacterium johnsoniae (strain ATCC 17061 / DSM 2064 / UW101) | FLAJ100772 | A5FLV4 | Glycoside hydrolase, family 39 |
| [B] Anaerocellum thermophilum (strain DSM 6725 / Z-1320) | ANATD00171 | B9MMA7 | Glycoside hydrolase family 39 |
| [B] Caldicellulosiruptor saccharolyticus (strain ATCC 43494 / DSM 8903) | CALS802262 | A4XM46 | Glycoside hydrolase, family 39 |
| [B] Caulobacter crescentus | CAUCR02324 | Q9A5U0 | Beta-xylosidase |
| [B] Caulobacter sp. (strain K31) | CAUSK03071 | B0T1S0 | Xylan 1,4-beta-xylosidase precursor |
| [B] Acidiphilium cryptum (strain JF-5) | ACICJ03069 | A5FT29 | Glycoside hydrolase, family 39 |
| [B] Cellvibrio japonicus (strain Ueda107) | CELJU02901 | B3PD50 | Beta-xylosidase, putative, xyl39A |
| [B] Xanthomonas axonopodis (pv. citri) | XANAC03947 | Q8PFC5 | identified by sequence similarity; putative; ORF located using Blastx/Glimmer/Genemark beta-xylosidase |
| [B] Xanthomonas campestris pv. campestris | XANCP03863 | Q8P3U4 | Beta-xylosidase |
| [B] Xanthomonas campestris pv. campestris (strain 8004) | XANC803952 | Q4UPB9 | beta-xylosidase |
| [B] Xanthomonas campestris pv. campestris (strain B100) | XANCB04152 | B0RXZ9 | Exported xylan 1,4-beta-xylosidase |