Comparative expression of epitopes recognized by MoAbs to Rh polypeptides (R6A, BRIC 69) and GPA, Band 3, and Lu gp in cultures of CB cells. (A) Expression of R6A epitope compared with GPA. (B) Expression of R6A and BRIC 69 epitopes compared with Band 3. (C) Expression of R6A epitope compared with Lu gp.