Can we think to change the A type group blood sample into B type or O type (in vitro)?or B type into A or O type. or O type into A or B type. There is little difference between antigenic determinants ( glycoprotien) of the ABO blood group system.
1. N-acetylgalactosamine at terminal of glycoprotein in A type
2. galactose at terminal of glycoprotein in B type
3. neither N-acetylgalactosamine nor galactose at terminal of glycoprotein in O type.