megakaryocyte stimulatory factor ( msf ) has been purified to homogeneity ( 7.5 x 10 ( 5 ) -fold ) from serum-free conditioned medium obtained from cultured human embryonic kidney cells and to near homogeneity ( 1.44 x 10 ( 7 ) -fold ) from thrombocytopenic rabbit plasma .
C0229671
serum
C0032105
plasma