Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2014 May 28;15(1):407. doi: 10.1186/1471-2164-15-407

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© El Kafsi et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

PMC Copyright notice

Lactose transport and metabolism pathways in L. delbrueckii and its ancestors. In L. delbrueckii ssp. bulgaricus, lactose uptake relies on a lactose-galactose antiporter which has been acquired by horizontal gene transfer while the ancestral lactose PTS system has been lost. L. delbrueckii ssp. lactis contains both transport systems. In L. delbrueckii ssp. bulgaricus, lactose metabolism relies on a β-galactosidase which has been acquired by horizontal gene transfer while the ancestral β-galactosidases have been lost. L. delbrueckii ssp. lactis contains the same horizontally acquired β-galactosidase and, in addition, the pathways to completely metabolize lactose-6-P generated by the lactose PTS-system. PEP, phosphoenolpyruvate; Pyr, pyruvate.