Medicine:H antigen

From HandWiki
Short description: Antigens with different biological functions

H antigen can refer to one of various types of antigens having diverse biological functions:

  • Also known as substance H, H antigen is a precursor to each of the ABO blood group antigens, apparently present in all people except those with the Bombay Blood phenotype[1] (see hh blood group). The gene responsible for making H antigen is FUT1, located on the 19th chromosome in humans
  • Histocompatibility antigen, a major factor in graft rejection. Even when Major Histocompatibility Complex genotype is perfectly matched, can cause slow rejection of a graft.[2]
    • major H antigens "encode molecules that present foreign peptides to T cells"[2]
    • minor H antigens "present polymorphic self peptides to T cells".[2] Includes, e.g. the H-Y antigen
  • a bacterial flagellar antigen[3]

References

  1. Science Of Biogenetics (18 December 2023). "Do you Know Bombay Blood Group". http://www.scienceofbiogenetics.com/do-you-know-bombay-blood-group/. 
  2. 2.0 2.1 2.2 Janeway, Charles A. (2001). Immunobiology the immune system health & disease (5. ed.). New York: Garland. ISBN 978-0-8153-3642-6. https://archive.org/details/immunobiology00char. Retrieved 16 December 2013. 
  3. Farlex. "antigen". The Free Dictionary. http://medical-dictionary.thefreedictionary.com/antigen. Retrieved 16 December 2013.