LnbX and B. longum (IMAGE) Cell Press Caption Human milk oligosaccharides selectively promote bifidobacterial growth in the infant gut. This visual abstract depicts the findings of Yamada and Gotoh et al., who provide the structural basis of lacto-N-biosidase (LnbX), a key enzymatic factor for growth and proliferation of <i>B. longum</i> in breastfed infants. Credit Yamada and Gotoh et al./<i>Cell Chemical Biology</i> 2017 Usage Restrictions Credit Required. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.