Alzheimer's disease Alzheimer’s disease is a common form of dementia, with symptoms affecting memory, thinking and behavior.

Apoptosis The programmed death of cells, a critical mechanism by which aging and sick cells make way for new healthy ones.

Dendritic cells Dendritic cells are specialized immune system cells that orchestrate a range of defenses against infectious agents and also prevent the immune system's machinery from attacking the body's own tissues.

Epigenetics Epigenetics is a field of research that explores the inheritance of physical changes that cannot be traced back to mutations in the DNA sequence.

Histones Histones are proteins that package and order DNA into complexes called nucleosomes, and by facilitating the ability of the cell’s transcription machinery to access specific segments of DNA they are believed to play an important role in gene regulation.

Leptin Leptin is a hormonal signal made by the body’s fat cells that regulates food intake and energy expenditure and plays a key role in regulating appetite and body weight.

Nuclear pore complex The nuclear pore complex is a protein assembly found in the membrane surrounding the cell nucleus.

Small RNAs Short snippets of RNA, ranging from about 21 to 26 nucleotides in length, that silence gene expression.

Stem cells Stem cells are uniquely versatile cells that retain the ability to replicate indefinitely through cell division and to differentiate into specialized cell-types.

Trypanosomes Trypanosomes are single-celled parasitic protozoa which can be carried by insects, plants, birds and mammals and are the cause of widespread disease in South America and Africa.