Media type: E-Article Title: Evolutionary conservation of mechanisms upstream of asymmetric Nodal expression: Reconciling chick and Xenopus Contributor: Levin, Michael; Mercola, Mark imprint: Wiley, 1998 Published in: Developmental Genetics Language: Not determined DOI: 10.1002/(sici)1520-6408(1998)23:3<185::aid-dvg4>3.3.co;2-t ISSN: 1520-6408; 0192-253X Keywords: Cell Biology ; Developmental Biology ; Genetics Origination: Footnote: