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Frequently Asked Questions

• How long does it take to count a Zzap note?

  High-speed note counting means you can save time so you can give other responsibilities that extra priority. ZZap banknote counters can count up to £20,000 in just 13 seconds. ZZap coin-handling machines are the perfect way to save time and money.

• What kind of reagent is Zzap used for?

  With that out of the way, what is it? ZZap is a reagent composed of a mixture of a proteolytic enzyme (papain) and a sulfhydryl reagent (dithiothreitol, or “ DTT “). It is used most often in immunohematology reference labs rather than hospital transfusion services, especially in workups for warm autoantibodies.

• When to use Zzap for warm autoantibodies?

  It is used most often in immunohematology reference labs rather than hospital transfusion services, especially in workups for warm autoantibodies. ZZap removes immunoglobulins and complement from the surface of DAT -positive red blood cells. ZZap also deactivates a multitude of red cell antigens on the red cell surface.

• How does Zzap work on DAT positive red blood cells?

  ZZap removes immunoglobulins and complement from the surface of DAT -positive red blood cells. ZZap also deactivates a multitude of red cell antigens on the red cell surface. The most important antigens damaged/destroyed by ZZap include all Kell antigens, M, N, and the two main Duffy antigens (Fy a and Fy b), to name a few.

• How does Zzap work on DAT positive red blood cells?

  ZZap removes immunoglobulins and complement from the surface of DAT -positive red blood cells. ZZap also deactivates a multitude of red cell antigens on the red cell surface. The most important antigens damaged/destroyed by ZZap include all Kell antigens, M, N, and the two main Duffy antigens (Fy a and Fy b), to name a few.

• When to use Zzap for warm autoantibodies?

  It is used most often in immunohematology reference labs rather than hospital transfusion services, especially in workups for warm autoantibodies. ZZap removes immunoglobulins and complement from the surface of DAT -positive red blood cells. ZZap also deactivates a multitude of red cell antigens on the red cell surface.

• Who is the inventor of the blood bank Zap?

  First things first: According to the inventor of this specialized blood bank reagent (Dr. Donald Branch, now with Canadian Blood Services, but at the time of invention at City of Hope in Southern California), it should be said like this: “ZAP” (not the more commonly used “ZEE-ZAP”).

• What kind of reagent is Zzap used for?

  With that out of the way, what is it? ZZap is a reagent composed of a mixture of a proteolytic enzyme (papain) and a sulfhydryl reagent (dithiothreitol, or “ DTT “). It is used most often in immunohematology reference labs rather than hospital transfusion services, especially in workups for warm autoantibodies.