After conducting allogeneic adsorption on R2R2 phenotype, which antibodies will remain detectable in the patient serum?

In the context of allogeneic adsorption, the process is utilized to remove certain antibodies from a patient's serum by using red blood cells that have specific antigen phenotypes. In this scenario, individuals with the R2R2 phenotype express the C and c antigens, and they typically lack the E, e, and other antigens. This is critical when determining which antibodies remain detectable after treatment.

Given the R2R2 phenotype, antibodies that target antigens present on the adsorbed red blood cells will be removed from the serum. The correct answer highlights the presence of antibodies that do not react with the R2R2 cells, specifically the anti-C, anti-e, and anti-Jkb antibodies.

Anti-C is expected to still be detectable since the R2R2 cells have the C antigen that would lead to its removal through adsorption. On the other hand, since e and Jkb will be negated due to adsorption involving R2R2 red cells, these antibodies will not be able to react.

Thus, after allogeneic adsorption on R2R2 phenotype cells, the antibodies remaining detectable in the patient serum are those that do not have their specific antigens present on the adsorbed cells. As such,