The language of life is spoken through DNA. As with words, however, their meaning is open to interpretation. Genetic ‘words’ are formed through an interplay between environmental factors and DNA by means of epigenetics – an extra layer of chromosome coding. Chromosomes are formed from proteins (inside dark blue line; CGI upper panels) called histones around which DNA is ‘spooled’. Histones are tagged by special protein catalysts (enzymes) like SUV39h. This enzyme helps generate an‘epigenetic code’ by tagging histones. Without it (right-hand images) an abnormality arises that adversely affects the cell’s ability to make protein. These kinds of abnormality are common in diseases such as cancer. Understanding epigenetic processes has important implications for human health and the development of new treatments for a wide variety of diseases.
BPoD stands for Biomedical Picture of the Day. Managed by the MRC Laboratory of Medical Sciences until Jul 2023, it is now run independently by a dedicated team of scientists and writers. The website aims to engage everyone, young and old, in the wonders of biology, and its influence on medicine. The ever-growing archive of more than 4000 research images documents over a decade of progress. Explore the collection and see what you discover. Images are kindly provided for inclusion on this website through the generosity of scientists across the globe.
BPoD is also available in Catalan at www.bpod.cat with translations by the University of Valencia.