abstract |
An object of the present invention is to form and maintain differentiated cells, tissues or organs. The present invention provides a composition for inducing differentiation of cells having a predetermined differentiation direction, and into cells, tissues, or organs further differentiated in the differentiation direction. The composition comprises NELL-1 or a substance that changes to function as NELL-1 at the time of differentiation. The invention also provides compositions for maintaining differentiated cells, tissues or organs. |