Selectable reporter genes

Selectable marker genes include those conferring resistance to methotrexate (dhfr, isolated from Tn7 or plasmid R67); the antibiotics kanamycin (nptII, encoding neomycin phosphotransfcrase) and hygromycin (hptIV, encoding hygromycin phosphotransferase, .isolated from E. coli);

TLS Online TPP Program

#Id: 191

#Unit 5. Developmental Biology

At slightly lower concentrations (intermediate concentrations), activin (about 100 molecules per cell) activated the Xbra gene and instructed the cell to become muscle.

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#Id: 9594

#Unit 11. Evolution and Behavior

Dryopithecus is considered as the common ancestor of the apes and man. 

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#Id: 3687

#Unit 2. Cellular Organization

Pathogenicity islands GC content often differs from that of the rest of the genome, and it is likely that these regions are spread among bacteria by a process of horizontal transfer.

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#Id: 8435

#Unit 10. Ecological Principles

r-selected species

High rate of per capita population growth

poor  competitive ability

Grows quickly 

age early, 

devoting much energy to producing  large number of progeny 

Small in size, and individuals do not live long. 

Random matting

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#Id: 3115

#Unit 3. Fundamental Processes

The origin of E. coli, oriC, is 245 bp in length.