These are His-tag subsequently removed by cleavage with a reagent such as cyanogen bromide and the protein of interest purified by protein biochemical methods such as chromatography and polyacrylamide gel electrophoresis.

TLS Online TPP Program

#Id: 6298

#Unit 3. Fundamental Processes

The transition from the closed to the open complex involves structural changes in the enzyme and the opening of the DNA double helix to reveal the template and nontemplate strands. This “melting” occurs between positions –11 and +2, with respect to the transcription start site.

TLS Online TPP Program

#Id: 8806

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 8977

#Unit 11. Evolution and Behavior

Molecular clock - The concept of a steady rate of change in DNA sequences over time. 

TLS Online TPP Program

#Id: 5726

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 5735

#Unit 10. Ecological Principles

Communities in Climatically Similar Habitats May Themselves Be Similar in Species Richness

A stable community changes little in species richness over time