Proliferative responses of MCs obtained from AIHA cases no. 2 (A), 7 (B), and 8 (C) against the panel of 42 peptides corresponding to the Rh Cc/Ee protein. In each case, all the peptides were tested on a single occasion, and the dashed line indicates the level of proliferation taken as representing a positive response (the higher of SI = 3 or CPM = 500). Positive control responses to the foreign recall antigen PPD are also shown.