title: Differentiation and gene regulation. Web alert
abstract: A selection of World Wide Web sites relevant to papers published in this issue of Current Opinion in Genetics & Development.
authors.affiliation: National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Building 38A, Room 8N-805, Maryland 20894, Bethesda, USA.
authors.initials: W
authors.lastname: Makalowski
authors.initials: T
authors.lastname: Wolfsberg