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*'''Bromodeoxyuridin (BrdU)''' - synthetic nuceloside that is an analogue of thymidine, often wrongly transcribed into the DNA of dividing cells
 
*'''Bromodeoxyuridin (BrdU)''' - synthetic nuceloside that is an analogue of thymidine, often wrongly transcribed into the DNA of dividing cells
 
*'''Bursa of Fabricius''' - site of haematopoesis in birds and necessary for the maturation of B-cells. The bursa develops as a dorsal diverticulum of the proctadael region of the cloaca (lat. ''bursa fabricii'')
 
*'''Bursa of Fabricius''' - site of haematopoesis in birds and necessary for the maturation of B-cells. The bursa develops as a dorsal diverticulum of the proctadael region of the cloaca (lat. ''bursa fabricii'')
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*'''B-cells''' - a subgroup of lymphocytes and precursor to antibody producing cells. Also known as B-lymphocyte
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*'''B-cell antigen receptor''' - receptor found on B-cells that identifies antigens usually composed of monoclonal IgM but occationally monoclonal IgD. Each B-cell has only one IgM antigen receptor and one IgD receptor of the same specificity
    
===C===
 
===C===
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