October 2026 QQ: Which is NOT an APL?

Our October 2026 Quick Question is a quiz that asks, “Which is NOT an antiphospholipid antibody?” The choices are…

1.  Anti beta-2 glycoprotein 1
2.  Alpha-2 antiplasmin
3.  Lupus anticoagulant
4.  Antiprothrombin
5.  Anticardiolipin

Antiphospholipid antibodies are acquired autoantibodies that bind phospholipid-bound proteins. Please go to the question on the right of your screen, make your selection, and add your comment below. (This entry is pinned to the home page throughout October.)