The effect of the tetrapeptides RGDS and RGES on the recognition and engulfment of apoptotic eosinophils by resting or IL-1–stimulated SAEC (10⁻¹⁰ mol/L for 20 hours). Washed apoptotic eosinophils were resuspended in HBSS containing the tetrapeptides to give a final concentration of 2 mmol/L before use in the interaction assay. Each point represents the mean ± SEM of 5 experiments (*P < .05, **P < .001).