Adprhl1 is expressed exclusively in the heart of all vertebrates.
Morpholino knockdown of Adprhl1 prevents outgrowth of the ventricle.
Elevated 40 kDa Adprhl1 produces disarrayed myofibrils that show extensive branching.
The 5′-coding sequence of Xenopus adprhl1 influences the synthesis of Adprhl1 protein.
Two Adprhl1 proteins, 40+23 kDa exist in Xenopus embryos and are conserved in mouse.