The main four groups of antigens were first discovered roughly 120 years ago. Now, there are currently 45 recognized blood group systems, which roughly has 362 red blood cell antigens in the mix.

The researchers note that red blood cells also host many more antigens, some of which cannot be categorized easily but still play an important role in human health.

The A antigens can be extended to yield galactose (Gal)-A and H type 3 structures. Additional extension of H type 3 yields A type 3 antigen. Besides, an extended B antigen (ExtB) was reported in 2019.

In the study, people with alloantibodies (antibodies specifically produced following exposure to foreign red blood cell antigens) for Er antigens had their gene-coding DNA sequences analyzed.

SQZ TACs are a red blood cell ... The presentation includes novel preclinical data highlighting SQZ TACs and the reduction of antigen-specific CD4 and CD8 T cell activity and increase antigen ...

EBV antibodies to nuclear antigen, early antigen, and IgG and immunoglobulin M (IgM) were high. Massive splenomegaly and small mesenteric and retroperitoneal lymph nodes were found in a chest CT scan.

Addressing the pressing demand for rapid and inexpensive coagulation testing in cardiovascular care, this study introduces a novel application of repurposed COVID-19 rapid antigen tests (RATs) as ...