The enzyme RNA polymerase II transcribes genes into messenger RNA. This process is guided by modifications to the enzyme's ...

Scientists have long been intrigued by the ability of flatworms to regenerate complete bodies from small fragments of tissue.

When young donor myeloid cells are transplanted into aging mouse brains, they quickly adopt aging phenotypes. In contrast, old myeloid cells transplanted in young brains take on a more youthful aspect ...