it has been established that the only source of tissue thromboplastin activity in homogenate of cells ( hela , l-41 , ramt , hep-2 and fl ) grown in synthetic nutrient media are permolecular formations represented by fragments of cellular membranes thromboplastic activity of nutrient media is also associated with these formations , as fragments of cellular membranes enter the media during cell cultivation .
C0007603
cellular membranes
C0007634
the