Stephen Jones

Hi mrpessimist, Humans a lot to the Rhesus macaque,But perhaps most importantly it first alerted scientists to the existence of the famous 'Rh factor' in human blood, a molecule that is either present (Rh+) or absent (Rh-) on our red blood cells.The two major blood group systems used in transfusions are the Rhesus factor and the ABO blood group system. The ABO blood group system people with blood type A have one type of molecule, whereas people with blood type B have another. People with blood type AB have both molecules on their red blood cells and people with blood type O have no molecules of this group present. Antigens also have corresponding antibodies in our blood plasma to identify when foreign antigens are introduced into our bodies. People with blood type A have anti-B antibodies, blood type B have anti-A antibodies, blood type AB have neither antibody and blood type O have both. Thanks..... DNA Methyl transferase 3B