Before a cell divides, its DNA is replicated so that each daughter cell inherits the same genetic information. The two copies, known as "sister chromatids," are held together by a ring-shaped protein ...

If you are anything like us, whenever you plan a journey, you spend a remarkable amount of time thinking about the start and ...

Cells have evolved careful checks to ensure DNA is copied only once, but how they switch on replication at the right moment ...

Embryonic stem (ES) cells are pluripotent stem cells that can produce all cell types of an organism. ES cells proliferate rapidly and have been thought to experience high levels of intrinsic ...