Index Protein Name Organism UniProt ID/ACC #Protein-Ligand Complex(es) 1 Beta-galactosidase Bifidobacterium bifidum Q9F4D5/Q9F4D5_BIFBI 1 2 Beta-galactosidase Escherichia coli (strain K12) P00722/BGAL_ECOLI 4 3 Beta-galactosidase Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2) (Sulfolobus solfataricus) P22498/BGAL_SACS2 2 4 Beta-galactosidase, putative, bgl35A Cellvibrio japonicus (strain Ueda107) (Pseudomonas fluorescens subsp. cellulosa) B3PBE0/B3PBE0_CELJU 1