(A-B) Representative UCSC Genome Browser tracks for NF-YA, Pbx4 and
Prep1 ChIP-seq analyses at 3.5hpf. (C, F, I, L) Venn diagrams showing the
overlap (at least 1bp shared between 200bp fragments centered on peaks) of two
Pbx4 ChIP-seq replicates (C), the overlap of Pbx4 and Prep1 ChIP-seq peaks (F),
the overlap of two NF-YA ChIP-seq replicates (I) and the overlap of TALE and
NF-Y ChIP-seq peaks (L). (D, G, J, M) The top sequence motif returned by MEME
for Pbx4-occupied sites (D), Pbx4/Prep1 co-occupied sites (G), NF-YA occupied
sites (J) and TALE/NF-YA co-occupied sites (M). (E, H, K, N) The top 25 gene
ontology (GO) terms returned by the GREAT analysis tool for genes associated
with Pbx4-occupied sites (E), Pbx4/Prep1 co-occupied sites (H), NF-YA occupied
sites (K) and TALE/NF-YA co-occupied sites (N). (O) Chart showing percent of
ChIP-seq peaks found within 5kB or 30kB of a promoter. (P, Q) Top sequence motif
returned by MEME for peaks bound by TALE, but not NF-YA (P) and peaks bound by
NF-YA, but not TALE (Q). Only peaks with a 10-fold or greater enrichment over
input (FE≥10) were considered for the analyses in C-Q.