What critical ability do mature newt cardiomyocytes retain that mature mammalian cardiomyocytes lack?

Answer

The ability to re-enter the cell cycle and divide

Newt heart muscle cells retain the capacity to re-enter the cell cycle, proliferate, and differentiate to replace lost tissue, whereas mature mammalian cardiomyocytes cease proliferation.

What critical ability do mature newt cardiomyocytes retain that mature mammalian cardiomyocytes lack?
anatomyheartnewt