What is the H antigen made of?
A short sequence of sugars (oligosaccharide) found on many cells in the human body, but especially attached to red blood cell membranes and floating free in plasma and secretions.
What is the full form of H antigen?
Histocompatibility antigen, a major factor in graft rejection.
What is the function of the gene product of the H locus?
The H gene encodes an enzyme that is required in the expression of the H antigen on the surface of red blood cells. Translation of the active allele, H, of the FUT1 gene results in formation of the enzyme known as α-1,2-fucosyltransferase (H is also known as FUT1 because the gene product is a FUcosyl Transferase).
Is H antigen A protein?
H antigen is a part of flagella. It is the slender threadlike structure of the flagella. H antigen is composed of flagellin protein. Hence, it is a proteinaceous antigen.
What are H and O antigens?
For instance, Salmonella bacteria look alike under the microscope but can be separated into many serotypes based on two structures on their surface: The outermost portion of the bacteria’s surface covering, called the O antigen; and. A slender threadlike structure, called the H antigen, that is part of the flagella.
What is the H gene?
What is the difference between typhoid O and typhi H?
S typhi O positive means active infection of typhoid fever. Active infection indicates the patient has an infection of Salmonella enterica serovar typhi. S typhi H positive means there is a past infection or it shows the result of the immunized person’s serum test report.
Which blood group has the most H antigen?
Depending upon a person’s ABO blood type, the H antigen is converted into either the A antigen, B antigen, or both. If a person has group O blood, the H antigen remains unmodified. Therefore, the H antigen is present more in blood type O and less in blood type AB.
What is an antigen and how do they function?
An antigen is a molecule that stimulates an immune response by activating lymphocytes, which are white blood cells that fight disease. Antigens may be present on invaders such as cancer cells, bacteria, viruses, parasites, fungi, and transplanted organs and tissues.
What are the different types of human antigen?
Types of Antigen On the basis of order of their class (Origin) Exogenous antigens These antigens enters the body or system and start circulating in the body fluids and trapped by the APCs (Antigen processing cells such as macrophages, dendritic cells, Endogenous antigens These are body’s own cells or sub fragments or compounds or the antigenic products that are produced. Autoantigens
What is hh blood type?
The hh blood type is the rarest blood type which does not express the H antigen present on virtually all RBCs as the building block for other antigens. Explanation: The H antigen (genetically HH or Hh) is a surface protein on RBCs that is found in All the major blood groups. The H antigen is the building block for the other surface antigens A and B.