Fig. 2.

CD16 and CD32 surface expression by polymorphonuclear neutrophils (PMN) from normal subjects untreated (black lines) or treated (grey lines) with MoAb 18B7 (10 αg/ml) or with 6995 (E:T = 1:2) plus MoAb 18B7 (10 αg/ml) for 10 min or 40 min. 6995 alone did not regulate CD16 or CD32 expression at the indicated time. The results reported are from a representative experiment of four performed with similar results.