Mechanism	Retaining e
Clan	GH-A
3D Structure Status	( β / α ) 8 barrel
Catalytic Nucleophile/Base	Glu (experimental)
Catalytic Proton Donor	Glu (experimental)
External resources	CAZypedia; PROSITE;
Commercial Enzyme Provider(s)	MEGAZYME; PROZOMIX;
Statistics	GenBank accession (501); Uniprot accession (24); PDB accession (23); 3D entries (9); cryst (0)

Bacteria
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D Carbohydrate Ligands Resolution (Å)	Subf
BACCELL_00063 (BcGH2SBD)		Bacteroides cellulosilyticus DSM 14838	EEF92278.1		6B6L[A,B] 2.00 7RSK[A,B] 2.40	1
exo-β-galactosidase porphyran-specific (NP1_22; BuGH2A)	3.2.1.23	Bacteroides uniformis NP1	WP_234130811.1	A0A2D0TCC8	5T98[A,B] 2.60 5T99[A,B] 2.40	1
agarolytic β-galactosidase (BuGH2C)	3.2.1.23	Bacteroides uniformis NP1		A0A2D0TCC9	5T9A[B,C,D] 2.50 5T9G[A,B,C,D] 2.40 5T9A[A] 2.50	1
β-galactosidase (BIF3)	3.2.1.23	Bifidobacterium bifidum DSM 20215	CAC14566.2 AAP64961.1 ABI07182.1 CAD19366.1	Q9F4D5	6QUB[A,B] β-D-Galp 1.95 6QUC[A,B] 2.30 6QUD[A] α-D-2-deoxy-Galp-(1-4)-GLU 2.10 7NIT[A,B,C,D,E,F] 2.89	1
lacto-N-neotetraose β-galactosidase (BbgIII)	3.2.1.23	Bifidobacterium bifidum JCM 1254	BAI94821.1	D4QAP3	5DMY[A,B,C] 1.95	1
β-galactosidase A / B / C / D / 91 (Bga; BgaD; β-Gal-A; β-Gal-B; β-Gal-C; β-Gal-D; β-Glα-91; GALA)	3.2.1.23	Niallia circulans ATCC 31382	BAJ61032.1 QEP29033.1	E5RWQ2	4YPJ[A,B] 2.50 8Q2H[A] 3.20 8Q4Y[A] 4.00 8Q51[A] 4.00	1
β-galactosidase II (BgaB)	3.2.1.23	Niallia circulans ATCC 31382	QJU69416.1	A0A6M5K904	7CWD[A] α-D-Galp-(1-4)-GLU α-D-Glcp 2.00 7CWI[A] 1.95	1
BVU_0391		Phocaeicola vulgatus ATCC 8482	ABR38109.1		3GM8[A] 2.40	1
β-1,4-galactosidase A (BgaA;SP0648;SP_0648)	3.2.1.23	Streptococcus pneumoniae TIGR4	AAK74795.1 ABA35731.1 NP_345155.1	A0A0H2UP19 Q9KGU0	4CU6[A] 2.70 4CU7[A] 2.20 4CU8[A] <carb_like_DGJ> 2.50 4CUC[A] β-D-Galp-(1-4)-β-D-GlcpNAc 2.20	1
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