Fig. 3. Release of lactate dehydrogenase (LDH) activity (A) and measurement of ATP levels (B) in TIGK cells after 18 h exposure to peptidomimetic compounds. Concentrations of compounds used are as follows: 95 (5, 20 and 40 μM), 111 (5, 20, 60 μM), 115 (5, 10, 20 μM) and 122 (5, 20, 60 μM). The asterisk indicates a significant decrease in ATP relative to cells exposed to medium containing 0.1% DMSO; *p < 0.05.