We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleWnt proteins are lipid-modified and can act as stem cell growth factors.AuthorsWillert K; Brown JD; Danenberg E; Duncan AW; Weissman IL; Reya T; Yates JR 3rd; Nusse RPublicationNature, 2003, Vol 423, Issue 6938, p448ISSN0028-0836Publication typearticleDOI10.1038/nature01611