(A) Dissection of six to eight 8-cell stage embryos in 3 biological
replicates at 2 h post-fertilization (hpf) to separate animal and vegetal
blastomeres for RNA sequencing.
(B) Log2-transformed transcripts per million (TPM) expression of TFs in
animal and vegetal blastomeres. Differentially expressed TFs are highlighted in
green (vegetal) or orange (animal).
(C) Log2-transformed fold change (animal over vegetal) of expression
levels of localized TFs.
(D–F) In situ hybridization showing
otx1 expression (cells in blue) in the vegetal mass cells
(presumptive endoderm) during early blastula (D), late blastula (E), and early
gastrula (F).