Survival of Animal Tissue Cells in Primary Culture in the Absence of Serum

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Abstract
The ability of cells from tissues of several species of animals to survive in primary culture without serum was tested. Of the species tested, cells from the kidneys of Macaca mulatta (rhesus) and Cercopithecus aethiops (vervet) monkeys and chicken embryo cells not only survived under these conditions, but indeed developed into confluent monolayer cultures. The addition of either serum or its globulin or albumin fraction enhanced the development of cell monolayers and permitted those cells unable to survive in the absence of serum to do so. Certain specific protein trypsin-inhibitors not of serum origin were unable to provide conditions necessary for cell survival or growth when used in place of serum proteins.

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