Antigen
An antigen is any substance that causes your immune system to produce antibodies against it. An antigen may be a foreign substance from the environment such as chemicals, bacteria, viruses, or pollen. An… More »
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The transfusion will work if a person who is going to receive blood has a blood group that doesn't have any antibodies against the donor blood's antigens. But if a person who is going to receive blood has antibodies matching the donor blood's antigens, the red blood cells in the donated blood will clump.
nobelprize.org/educational_games/medicine/landsteiner/r... nobelprize.org/educational_games/medicine/landsteiner/readmore.html
The antigens which determine blood types belong to glycoproteins and glycolipids. There are three types of blood-group antigens: O, A, and B. They differ only slightly in the composition of carbohydrates.
www.web-books.com/MoBio/Free/Ch1B5.htm
 Chapter 2:  Blood group antigens are surface markers on the red blood cell membrane ... The cells that make up the body's tissues and organs are covered with surface markers, or antigens. Red blood cells are no different. This chapter will describe the types of red blood cell antigen and explain why they are so important...
www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=rbcantigen&... www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=rbcantigen&part=ch2
Chapter 2 Blood group antigens are surface markers on the red blood cell membrane ... Red blood cell antigens can be sugars or proteins ... Red blood cell antigens determine your blood group...
www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=rbcantigen www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=rbcantigen
Flow cytometric expression of CD3 and CD11b antigens on blood and milk leukocytes, leukocyte differential counts, bacterial counts in milk, and somatic cell counts were determined longitudinally. RESULTS: Density of CD3 molecules decreased on blood lymphocytes and increased on milk lymphocytes after infusion of bacteria.
www.medscape.com/medline/abstract/11763169
We demonstrated the feasibility of the simultaneous detection of infectious diseases from dried blood. Our novel method also provides a convenient tool for monitoring children from HIV-positive mothers and for possible screening efforts.
www.medscape.com/medline/abstract/15843206
ABO blood group system - Wikipedia, the free encyclopedia
The ABO blood group system is the most important blood type system (or blood group system) in human blood transfusion. The associated anti-A antibodies and anti-B antibodies are usually IgM antibodi...
en.wikipedia.org/wiki/ABO_blood_group_system
Blood type - Wikipedia, the free encyclopedia
A blood type (also called a blood group ) is a classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs). These antigens m...
en.wikipedia.org/wiki/Blood_type