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 E-Mail BOSTON - B cells are the immune cells responsible for creating antibodies, and most B cells, known as B2 cells, produce antibodies in response to a pathogen or a vaccine, providing defense and immunity against infections. But a small subset of long-lived B cells, known as B1 cells, are quite different from their short-lived cousins, the B2 cells. Instead of producing antibodies in response to invaders, they spontaneously make antibodies that perform vital housekeeping functions, such as removing waste like oxidized LDL cholesterol from the blood. Like all the cells in the body, B1 and B2 cells have the same DNA, and therefore the same starting set of instructions. It is through epigenetic modifications, which open and close different areas of the genome to the machinery that reads the genetic instructions, that the same genome can be used to create unique instructions for each cell type. Understanding how the different epigenetic landscapes - the changes in instructions -

United statesVinay mahajanHamid mattooVinayak viswanadhamAnnaiah cariappaSamuel jh murphyMaimuna ahmadYesim tuncayNature communicationsRagon instituteNational institutes of healthRagon institute strategic fundingSusanm ragon foundationHugues allard chamardNational institutesRagon institute strategic