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With the cells exposed to LTA alone. The figure represents one of three individual experiments.TG-sensitive Ca 2+ stores and the extracellular Ca 2+ influx which is essential for LTA-induced proMMP-9 expression in RBA-1 cells. To further determine the effect of Ca2+ signaling on LTA-stimulated JNK/c-Jun cascade, the JNK and c-Jun phosphorylation stimulated by LTA in the presence of BAPTA/AM or TG