Figure 1

Ca²⁺ mobilization in Fluo-3-labelled RBCs of the lizard T. torquatus: A) RBCs incubated in calcium medium (1 mM CaCl₂) were treated where indicated with the SERCA inhibitor, thapsigargin (5 μM). as in A, but CaCl₂ was omitted and the medium was supplemented with 15 mM EGTA THG (5 μM) was add before addition of Ca²⁺ ionophore ionomycin (10 μM). C) Effect of THG (5 μM) in RBC pre incubated with ionomycin (10 μM). D) Monensin (25 μM) was not able to induce an intracellular Ca²⁺ increase.