The Nus proteins—joins polymerase in the elongation phase and promotes.

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#Unit 3. Fundamental Processes

There are 27 of these repeats in the yeast Pol II CTD, 32 in the worm Caenorhabditis elegans, 45 in the fly Drosophila, and 52 in humans.  YSPTSPS repeats in CTD corresponds to the complexity of the genome.

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#Unit 4. Cell Communication and Cell Signaling

There are 18 different antigenic subtypes for HA and 11 for NA.

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#Unit 13. Methods in Biology

To measure the activity of a promoter, one can link it to a reporter gene, such as the genes encoding b-galactosidase, CAT, or luciferase, and let 

the easily assayed reporter gene products indicate the activity of the promoter.

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#Unit 11. Evolution and Behavior

The selection gradient measures the strength of directional selection acting on a quantitative trait.

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#Unit 8. Inheritance Biology

Restriction Fragment length Polymorphism (RFLP) 

RFLP is generated by the presence and absence of a recognition site for the same restriction endonuclease in the same region of a chromosome from the different individuals of a species.

result, the concerned restriction enzyme produces fragments of different lengths

These differences are detected by gel electrophoresis combined with hybridization with a labelled (usually, radiolabelled) probe specific for that chromosome region.