A representative flow cytometric measurement of L-selectin in a dexamethasone-treated rabbit. The curve was shifted to left by dexamethasone at 12 hours after treatment. At 24 hours after treatment, two distinct populations of cells are seen. One population shows lower levels of L-selectin expression similar to the expression at 12 hours after treatment (left) and the another shows higher levels of L-selectin expression similar to the expression of baseline (right).