Conserved themes but novel activities in recombinases and topoisomerases

Article Abstract:

Type 1B topoisomerases and tyrosine recombinases have common structures and mechanisms that suggest a link between them. For instance, the mechanism of the two enzyme families involves the formation of a covalent 3' phosphotyrosine DNA-enzyme intermediate in a reaction independent of magnesium ions. The vaccinia enzyme consists of several motifs that are conserved among type 1B topoisomerases. The vaccinia enzyme also can resolve Holliday junctions and has a strict site selectivity, properties commonly observed in recombinases.

Physiological aspects, Enzymes, Enzyme structure-activity relationships, DNA topoisomerase I

---

A novel mineral flotation process using Thiobacillus ferrooxidans

Article Abstract:

Thiobacillus ferrooxidans could be used to remove pyrite from a mineral solution. When added to five sulfide minerals in suspension, the bacterium reduced the floatability of pyrite from 90% or greater to less than 20%. The other four minerals were unaffected.

Evaluation, Production processes, Bacterial leaching, Ores, Pyrites, Bioleaching

---

Similar abstracts:

• Abstracts: Heterogeneous X inactivation in trophoblastic cells of human full-term female placentas. Physical exercise-induced hypoglycemia caused by failed silencing of monocarboxylate transporter 1 in pancreatic [beta] cells
• Abstracts: The diet of the Antarctic Shag during summer at Nelson Island, Antarctica. Comparisons of coastal fringe and interior forests as reserves for Marbled Murrelets on Vancouver Island
• Abstracts: Role of macrophages in peripheral nerve degeneration and repair. Development of myelin Mosaicism in the optic nerve of heterozygotes of the X-linked myelin-deficient (md) rat mutant
• Abstracts: Carrier detection of deletions in female relatives of X-linked disorders by non-isotopic in situ hybridisation
• Abstracts: Early days of gel electrophoresis. Ultraviolent radiation screening compounds. Screening for carriers of the avian cartilage proteoglycan core protein defect, nanomelia, by denaturing gradient gel electrophoresis

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.