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Multiple Choice

In RBC antigen notation, what does the designation D-C-E-c+e+ indicate about the unit?

In this notation, the signs after each antigen tell you whether that antigen is present or absent on the red cells. A minus after an uppercase letter means that antigen is not present; a plus after a lowercase letter means that antigen is present. So D-, C-, E-, c+, e+ means the unit lacks D, lacks C, and lacks E antigens, but it has the c and e antigens. In other words, it is negative for D, C, and E, and positive for both c and e.

In this notation, the signs after each antigen tell you whether that antigen is present or absent on the red cells. A minus after an uppercase letter means that antigen is not present; a plus after a lowercase letter means that antigen is present. So D-, C-, E-, c+, e+ means the unit lacks D, lacks C, and lacks E antigens, but it has the c and e antigens. In other words, it is negative for D, C, and E, and positive for both c and e.