While toxic in high concentrations, copper is essential to life as a trace element. Many tumors require significantly more copper than healthy cells for growth -- a possible new point of attack for ...
Differences in the ribosomal densities of the two daughters produced by a mother Escherichia coli could explain the asymmetry of aging and growth rate in previously reported such daughter pairs.
When a sperm cell fertilizes an egg, the resulting zygote has the genetic information from both cells but only cytoplasm—the substance that fills the cell—from the egg. That means that any of the ...