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  Home >> Genetics Dictionary >> Elongation factors, Enhancer

Elongation Factors
Proteins required for polypeptide elongation during protein synthesis.
2. A protein that complexes with ribosomes to promote elongation of polypeptide chains.

Embryo
An early stage of animal development that begins after division of the zygote (the earliest stage, in which joined egg and sperm have not yet divided)

Embryonic
Related to an embryo, or being in the state of an embryo.

EMG

Electromyogram. A recording of muscular activity during rest, during voluntary contractions, and during electrical stimulation.

Embryo

In humans, the developing organism from the end of the second week after fertilization to the end of the eighth week

           

Embryonic Stem (ES) cells
An embryonic cell that can replicate indefinitely, transform into other types of cells, and serve as a continuous source of new cells.
Emigration
The movement of organisms out of an area.

Emlen, Stephen
A world authority on the social behavior of animals, particularly birds. Emlen's interests center on evolutionary or adaptive aspects of animal behavior. The goal of his research is to better understand the social interactions that occur between individuals, especially cooperation and conflict

Empirical

Determined by experimentation.

Endler, John
A zoologist and professor with interests in evolution and how it affects geographic variation. His current research focuses on guppies (Poecilia reticulata) in their natural habitat, and how visual signs and vision dictate their behavior

Endonuclease

An enzyme that cleaves a nucleic acid molecule at internal positions. See: restriction enzyme.
2. An enzyme that breaks the internal phosphodiester bonds in a DNA molecule

Enhancer
A DNA sequence that influences the transcription of a nearby gene. Enhancers are differentiated from promoters by their ability to act over thousands of base pairs, and either upstream or downstream of a gene

 

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