HIF-2α increases neutrophil life span. (A-B) Human-equivalent HIF-2α gain-of-function mutations in zebra fish impair the clearance of green fluorescent protein–labeled neutrophils after a tail fin transection. (C) The increased neutrophil number is associated with a decrease in TUNEL-positive apoptotic neutrophils. See the complete Figure 3 in the article by Thompson et al that begins on page 366.