Now showing items 1-10 of 21
Grooming, aggression, and genetic relatedness in Parachartergus colobopterus, a neotropical swarm-founding wasp
I examined biting, grooming, and inspection behavior in a pre-emergent colony of Parachartergus colobopterus, a neotropical swarm-founding wasp, to determine whether kin discrimination occurs between adult colony members. ...
Studies on Escherichia coli tryptophan repressor-operator interactions
Trp repressor regulates the expression of TrpEDCBA, aroH, and TrpR operons. Recently, X-ray crystallographic analysis of a Trp repressor-operator complex has suggested a stoichiometry of one repressor dimer to one operator ...
The production of mutations in Drosophila melanogaster by irradiation with alpha-rays
The artificial transmutation of the gene is an old problem. Investigators tried to produce mutations artificially, but failed until 1927 when Muller announced that gene mutations could be produced by means of X-rays. This ...
Genes expressed during oogenesis in Calliphora erythrocephala and Drosophila melanogaster
We were interested in identifying genes in the dipteran flies Calliphora erythrocephala and Drosophila melanogaster with a role in oogenesis and early embryogenesis. A biochemical screen was used to complement the extensive ...
Osmotic stress and the yeast actin-based cytoskeleton
In order for cells to grow and survive, they must be able to overcome changes in their external environment. For example, stresses such as high or low temperatures and nutrient deprivation have been shown to elicit a ...