What characteristic differentiates Ss antigens from MN antigens?

An antibody that reacts in the IAT phase of the antiglobulin test and whose antigen expression is depressed by the In(Lu) gene is:

Why might some blood banking facilities prefer the use of monospecific IgG over polyspecifiic antihuman globulin (AHG) in their antibody screens?

Persons who are genetically P1 may serologically type as P2 because of:

Which of the following techniques/reagents may be useful in increasing the reactivity of anti-M?

What effect do enzyme-treated cells have on anti-I detection?

Neutralization of antibody is applicable to all of the following blood groups except:

Which antigen is expressed on C4B complement fragments?

A 2-unit crossmatch was ordered on a patient in the emergency room. The patient’s antibody screen was negative. One unit was compatible and the other was incompatible at AHG. If the patient’s antibody screen was negative and the donor had no history of antibodies, what could be the reason for this reaction?

One drop of Coombs’ control cells was added to a negative antibody screen. No agglutination was observed after centrifugation. What course of action is taken?