Quiescent fibroblasts are non-dividing cells in a reversible postmitotic state induced by lowering the serum concentration of the medium (e.g. from 10% to 0.3%). Three to seven days after lowering the serum concentration only minor metabolic changes will take place in the cells. During this period the quiescent fibroblasts can be used experimentally in a model system for various periods of time.
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Kristensen et al. (1988) studied this question.
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