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Biomedical subjects

H Stern

Publications and source records attributed to H Stern.

At least 235 records · Page 13Linked to original sources
PubMed1965

Inducibility of thymidine kinase by thymidine as a function of interphase stage.

Thymidine may act as an inducer of thymidine kinase activity in cells of higher plants. The general response is demonstrable in a randomly developing cell population such as is found in germinating wheat embryos. If a synchronously developing cell population is studied, however, potentially inducible cells are found to be susceptible to the inductive effect of thymidine only during about 10 per cent of the G1 period, and close to the interval when thymidine kinase activity normally appears.

Cell Division↗
PubMed1965

Nuclear DNA and cytoplasmic DNA from tissues of higher plants.

Young wheat roots were labeled with (32)P-inorganic phosphate. Following the labeling period, roots were homogenized in a sucrose medium and fractionated into nuclei, cytoplasmic particles (including proplastids and mitochondria), and a soluble fraction containing most of the microsomes. DNA prepared from the particles had a higher buoyant density than that from the nuclei and showed a marked loss in total label if the roots were exposed to non-radioactive medium for 48 hours prior to fractionation of the cells.

Cell Nucleus↗