Alagille Syndrom is caused by mutations in human Jaggedl, which encodes a ligand for Notchl. - Li,L.; Krantz,I.D.; Deng,Y.; Genin,A.; Banta,A.B.; Collins,C.C.; Qi,M.; Trask,B.J.; Kuo,W.L.; Cochran,J.; Costa,T.; Pierpont,M.EM.; et al. (Nature Genetics, 1997)