title: Factors influencing the uptake of DNA by Neurospora crassa.
abstract: Under optimal conditions intact Neurospora crassa cells incorporated nearly the same amount of 3H-labelled DNA as that of the endogenous DNA content of cells. After 18 h of incorporation more than 80 per cent of the radioactivity was retained in the cells. A maximum uptake of exogenous DNA occurred at 28 degrees C, pH 6.35, in the presence of 100 mM calcium when the concentration of donor DNA was 150 micrograms/ml. Denatured DNA was incorporated at a higher rate than native DNA. The present findings suggest that the uptake of DNA by Neurospora crassa is a biologically active process.
mesh_terms: D001692:Biological Transport; D004247:DNA / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009491:Neurospora / Q000378:metabolism*; D009492:Neurospora crassa / Q000378:metabolism*; D009691:Nucleic Acid Denaturation; D013696:Temperature
chemical_list: D004247:DNA