Jess Alexander

Learn More
The motion of fluid particles as they are pushed along erratic trajectories by fluctuating pressure gradients is fundamental to transport and mixing in turbulence. It is essential in cloud formation and atmospheric transport, processes in stirred chemical reactors and combustion systems, and in the industrial production of nanoparticles. The concept of(More)
Cell fate can be determined by asymmetric segregation of gene expression regulators. In the budding yeast Saccharomyces cerevisiae, the transcription factor Ace2 accumulates specifically in the daughter cell nucleus, where it drives transcription of genes that are not expressed in the mother cell. The NDR/LATS family protein kinase Cbk1 is required for Ace2(More)
Class III beta-tubulin, isolated from adult bovine brain, is resolved into at least seven charge variants on isoelectric focusing gels. To identify the posttranslational modifications responsible for this heterogeneity, a mixture of brain tubulins was treated with cyanogen bromide and the C-terminal fragments from the class III beta-tubulin isoforms were(More)
This paper presents a preparative and staining procedure for plant mitotic chromosomes that uses a combination of PI (propidium iodide) and DAPI (4′,6-diamidino-2-phenylindol) and which reveals a pattern of high-affinity regions for these fluorochromes. Nucleolar organiser regions (NORs), telomeres and centromeric regions exhibit high PI affinity (red),(More)
A proctolin-like peptide was isolated from the prosomal CNS of the chelicerate arthropod, Limulus, and purified using size exclusion, ion exchange and high performance liquid chromatography. Coincident bioassay (cockroach hindgut) and radioimmunoassay were employed to identify fractions which contained proctolin-like material. Proctolin-like activity(More)
Dye molecules were modified through exchange of a central nucleofugal functional group. Profound changes in the bandgap spacing and HOMO-LUMO levels were observed. Concentration quenching was observed for all the dyes and increases in external quantum efficiency of devices were observed after dyes were diluted through distribution within a polymer host. The(More)
Erythro-9-[3-(2-hydroxynonyl)]adenine (EHNA) inhibits axonemal dynein ATPase activity and hence the beating of sea urchin and mammalian flagella. We have found that EHNA has an unusual effect on the flagella of Leishmania promastigotes in that it alters both the waveform and polarity of the beat. We report here results which suggest that in Leishmania(More)
  • 1