FIGURE 5.

Enlarged view of selected heat peaks of a P-to-L titration experiment of penetratin into an equimolar DOPC/DOPG mixture (X_PG = 0.5). The calorimeter tracing is shown in the top panel. The bottom panel shows the respective differential heat of reaction. The peak becomes broader with indications of a second heat event near (P/L) ≈ 0.05 (left peak, see arrows for assignment). The thick arrow points to the local minimum of absolute q_p values that has been attributed to the onset of internalization of penetratin.