BioScience Dictionary

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 | Ot.

Found Express 122 times.

Displaying results 1 to 10.

1. Activation energy ( G, delta G)
The amount of energy (expressed in joules) that is needed to convert all the molecules in one mole of a reacting substance from a ground state to the transition state.

2. Alkalinity
Measure of the power of a solution to neutralize hydrogen ions (H+), usually expressed as the equivalent concentration (mg/L) of calcium carbonate (CaCO3).

3. Alpha viruses
These are the major virus es in the Togavirus group and include eastern and western equine encephalitis viruses, the Sindbis virus and the Semliki Forest virus. The last two viruses are being researched as vector s for expressing heterologous gene s.

4. Ambisense expression strategy
The coding of viral protein s in both the sense (coding) and antisense (noncoding) strands of complementary mRNA , so that the viral proteins are produced no matter which strand gets translated .

5. Amphotropic packaging cell lines, amphotropic virus
Clonal entities that express genes or act as viral vector s that infect cell lines to stably infect and then express genes of choice.

6. Arrhenius equation
This equation expresses the logarithmic relationship between the rate constant of a reaction and the reciprocal of the temperature (expressed in K).

7. Atomic mass (atomic weight)
This is the average mass of the naturally occurring isotopes of an element; the value takes into account the different natural abundances of the isotopes. The value is expressed relative to the value of exactly 12 for carbon-12

8. Attenuator
An RNA sequence that regulates the expression of certain gene s by terminating transcription .

9. Autosomal dominant (autosomal dominance)
This is a type of genetic inheritance ; a person who carries the gene on one allele will express (experience effects from) that gene. An autosomal dominant gene can be inherited from a single affected parent; both sons and daughters have an equal chance of inheriting the gene.

10. Base composition
In reference to nucleic acid, the proportion of the total bases consisting of guanine plus cytosine or thymine plus adenine base pairs. Usually expressed as a guanine + cytosine (G+C) value, e.g. 60% G+C.

View web definitions »

Learn more about Express »