Flowcytometry may also be used to investigate abnormalities in the collagen (GpVI and GpIa/IIa), thrombin receptors (PAR-1) and Glanzmann thrombasthenia (GpIb, GpIIb and GpIIIa) (1B). This evidence concerns the gene ITGA2B and Glanzmann thrombasthenia 1.