FIGURE 5.

The specific activities of all three biosynthetic enzymes at 0.5 h after stimulation with the spike protein (10 and 100 ng/ml). Stimulation with the 100 ng/ml of spike protein resulted in higher PAF‐CPT by 76% (A) in Lyso‐PAF ATC by 29% (B) and in Lyso‐PAF ATE by 47% (C) compared with non‐stimulated cells. The (*) symbol represents p ≤ 0.05 in comparison with non‐stimulated cells (baseline levels). Lyso‐PAF ATC: Lyso‐PAF acetyltransferase in the presence of Ca²⁺; Lyso‐PAF ATE: Lyso‐PAF acetyltransferase in the presence of EDTA; PAF‐CPT: PAF‐cholinephosphotransferase