Objective: To find out a method of extraction and purification of bone morphogenetic protein (BMP) from osteosarcoma cell conditionedmedium, and evaluate the biological activity of BMP.
目的探索从骨肉瘤细胞条件培养基中提取骨形态蛋白（BMP）的方法，并测定其生物学活性。
2
Objective: To find out a method of extraction and purification of bone morphogenetic protein (BMP) from osteosarcoma cell conditionedmedium, and evaluate the biological activity of BMP.
目的探索从骨肉瘤细胞条件培养基中提取骨形态蛋白(BMP)的方法，并测定其生物学活性。
3
Objective: To investigate the effects of bone marrow stromal cell conditionedmedium on differentiation of mesencephalic neural stem cells into neurons.