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KLEXJ extract enhances ALP activity and BMP-2 expression in osteoblasts. (A) Osteoblasts were treated with KLEXJ for 48 h and ALP activity was examined by a commercial ALP assay kit. (B&C) Osteoblasts were treated with KLEXJ for 24 h and BMP-2 expression was examined by qPCR and Western blot analysis. Results are expressed as mean ± S.E.M.*, p < 0.05 compared with control.