protein measurement L-selectin shedding study This test is used to measure the amount of L-Selectin (CD62L) shed from the surface of neutrophils before and after stimulation of the TLR pathway. The test can help identify patients with defects in their toll-like receptor signalling pathway and can be used to diagnose IRAK-4, MyD88 and UNC93B deficiency. (NHS) 2023-04-11T12:00:00Z