skip
navigation
Genome
Glossary
All Terms
A B C D E F
G H I J
K L M
N O P Q
R S T
U V W X Y Z
|
E
-
Electrophoresis
- A method of separating large molecules (such as DNA fragments or proteins) from a mixture of similar molecules. An electric current is passed through a medium containing the mixture, and each kind of molecule travels through the medium at a different rate, depending on its electrical charge and size. Agarose and acrylamide gels are the media commonly used for electrophoresis of proteins and nucleic acids.
-
Electroporation
- A process using high-voltage current to make cell membranes permeable to allow the introduction of new DNA; commonly used in recombinant DNA technology.
See also:
transfection
-
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.
-
Endonuclease
-
See:
restriction enzyme
-
Enzyme
- A protein that acts as a catalyst, speeding the rate at which a biochemical reaction proceeds but not altering the direction or nature of the reaction.
-
Epistasis
- One gene interfers with or prevents the expression of another gene located at a different locus.
-
Escherichia coli
- Common bacterium that has been studied intensively by geneticists because of its small genome size, normal lack of pathogenicity, and ease of growth in the laboratory.
-
Eugenics
- The study of improving a species by artificial selection; usually refers to the selective breeding of humans.
-
Eukaryote
- Cell or organism with membrane-bound, structurally discrete nucleus and other well-developed subcellular compartments. Eukaryotes include all organisms except viruses, bacteria, and bluegreen algae.
See also:
prokaryote, chromosome.
-
Evolutionarily conserved
-
See:
conserved sequence
-
Exogenous DNA
- DNA originating outside an organism that has been introducted into the organism.
-
Exon
- The protein-coding DNA sequence of a gene.
See also:
intron
-
Exonuclease
- An enzyme that cleaves nucleotides sequentially from free ends of a linear nucleic acid substrate.
-
Expressed gene
-
See:
gene expression
-
Expressed sequence tag (EST)
- A short strand of DNA that is a part of a cDNA molecule and can act as identifier of a gene. Used in locating and mapping genes.
See also:
cDNA, sequence tagged site
Updated 26-Apr-07
Return to home page
A B
C D E
F G
H I
J K
L M
N O
P Q
R S
T U
V W
X Y Z All
Terms
|
Last modified: Monday, February 01, 2010
Home * Contacts * Disclaimer
Document Use and Credits
Publications and webpages on this site were created by the U.S. Department of Energy Genome Program's Biological and Environmental Research Information System (BERIS). Permission to use these documents is not needed, but please credit the U.S. Department of Energy Genome Programs and provide the website http://genomics.energy.gov. All other materials were provided by third parties and not created by the U.S. Department of Energy. You must contact the person listed in the citation before using those documents.
Base URL: www.ornl.gov/hgmis
Site sponsored by the U.S. Department of Energy
Office of Science, Office
of Biological and Environmental Research, Human
Genome Program
|