Fig. 3
Lefty loss causes expanded expression of mesendodermal genes.
In situ hybridization comparing expression of endodermal (sox32/casanova) (A–E’’’) and mesodermal (noto/floating head) (F–J’’’) genes in wild type, lft1-/- mutants, lft2-/- mutants, and lft1-/-;lft2-/- mutants at the indicated developmental stages (dorsal views). Note upregulation of mesendoderm in lft1-/-;lft2-/- mutants starting at early gastrulation stages (e.g., shield stage). lft1-/-;lft2-/- embryos were generated from lft1+/-;lft2-/- incrosses, lft1-/-;lft2-/- incrosses, or lft1-/-;lft2-/- X lft1+/-;lft2-/- crosses. Embryos were genotyped after imaging (see Materials and methods for details).