Stability testing for Mouse CD27L: Mouse CD27L was aliquoted in PBS, pH 7 at 0.2 mg/ml and was treated as follow: one aliquot was kept at 4?°C (control), another was freeze-thawed four times (4x freeze-thaws), one incubated for seven days at room temperature (RT), and another incubated at 37?°C for one week. After this procedure, the samples were tested for their ability to induce proliferation of mouse T cells when anti-CD3 (1 µg/ml, Cat. No. 100207) is immobilized.