Evidence that the low-incidence red cell antigens Rl^a and Ls^a are identical

Testing of Ls(a-t-) and Rl(a+) red cells with numerous antisera containing antibodies to low-incidence antigens indicated that these antigens are identical. This conclusion was confirmed by adsorption and elution tests, and supported by immunoblotting of Ls(a-t-) and Rl(a+) cells with antibodies to glycophorin C and glycophorin D. Immunohematology 1996;12:8-10.