what is H antigen???
Answers
The H antigen is produced by a specific fucosyltransferase. Depending upon a person's ABO blood type, the H antigen is converted into either the A antigen, B antigen, or both. ... Therefore, the H antigen is present in the highest amounts in blood type O and in the least amounts in blood type AB.
H antigen can refer to one of various types of antigens having diverse biological functions. H antigen is located on the 19th chromosome in humans, and has a variety of functions and definitions as follows:
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 (see Hh antigen system)
Histocompatibility antigen, a major factor in graft rejection. Even when Major Histocompatibility Complex genotype is perfectly matched, can cause slow rejection of a graft.
major H antigens "encode molecules that present foreign peptides to T cells"
minor H antigens "present polymorphic self peptides to T cells".Includes, e.g. the H-Y antigen
a bacterial flagellar antigen