This group of beta-galactosidase enzymes belong to the glycosyl hydrolase 42 family. The enzyme catalyses the hydrolysis of terminal, non-reducing terminal beta-D-galactosidase residues.

1: Sequence analysis of flanking regions of the pfoA gene of Clostridium perfringens: beta-galactosidase gene (pbg) is located in the 3'-flanking region. Shimizu T, Kobayashi T, Ba-Thein W, Ohtani K, Hayashi H; Microbiol Immunol 1995;39:677-686. PMID:8577281