Fig. 4
From: Characterization of GH2 and GH42 β-galactosidases derived from bifidobacterial infant isolates
ONPG assay. Barplot showing the result of the ONPG assay performed on crude cell-free extracts of the 17 successfully cloned β-galactosidases. Crude cell-free extracts showing relative high level of enzymatic activity are indicated in red