Yeast is a good model system for studying ageing. The researchers can easily determine the age of the cells by counting the bud scars, formed when they divide and form new cells by budding (left). As ...

Microscope images show Candida albicans?in two distinct forms: as single-celled yeast (left), and in an elongated, thread-like form called a true hypha (right). Research suggests that a protein called ...