Fig 6. Hdac1 is required both cell and non-cell autonomously to promote VCs.

(A) Schematic of the blastula cell transplantation strategy. Vmhc (purple) indicates ventricle. Arrows indicate myl7:GFP⁺ cells (yellow). (B) Frequency of host WT embryos with WT and Hdac1-depleted donor GFP⁺ CMs at 48 hpf. n = 245 WT donor into WT host transplants; n = 244 Hdac1 deficient into WT host transplants. (C) Quantification of donor CMs (GFP⁺) found in host embryos hearts from transplants (n = 19 for WT in WT and n = 18 Hdac1-depleted in WT). (D) Frequency of host WT and Hdac1-depleted embryos with WT donor GFP⁺ CMs at 48 hpf. n = 169 WT donor into WT host transplants; n = 177 WT donor into Hdac1-depleted host transplants. (E) Quantification of donor CMs (GFP⁺) found in host embryos hearts from transplants (n = 18 for WT in WT and n = 12 WT in Hdac1-depleted). Fisher exact test was used to compare significance of frequencies in B and D.