欧美日韩国产精品观看_日韩无码操逼色网视频_99福利国产在线_黄色av激情五月天在线_亚洲国产中文91精品在线_亚洲黄色午夜福利_最新流露出of高能预警CDwant_亚洲激情视频美女_国产视频91久久精品91廣大網友最新影片_日韩成人激情综合网

There are various blood typing card based on the presence/absence of inherited antigen on the surface of erythrocytes, AOB and Rh being the most popular ones.

The AOB system is related to the immunoglobulins anti-A and anti-B, produced during the first years of life. Presence/absence of certain glycolipids in erythrocyte membrane determines the A, B, AB, and O blood groups.

The Rhesus system is suffixed to the ABO system. Although there are about 30 different antigens in this group, the common blood tests focus only on antigen-D. Rh test shows whether an individual has (Rh positive) or does not have (Rh negative) the 'Rhesus factor', or antigen-D, expressed by a transmembrane protein.