Is there a blood group called P?
Is there a blood group called P? The P blood group, which was discovered in 1927, consists of alleles designated P, P1, and Pk. The P and P1 antigens are produced by a gene known as B3GALNT1 (beta-1,3-N-acetylgalactosaminyltransferase 1), whereas the Pk antigen is produced by a gene called A4GALT (alpha 1,4-galactosyltransferase). What does P stands for in the P blood group system? P1PK (formerly: P) is a human blood group system (International Society of Blood Transfusion system 003) based upon the A4GALT gene on chromosome 22. The P antigen (later renamed P1) was first described by Karl Landsteiner and...