express

Vision

...this sense of the word. A company vision may express a corporate long-term goal - not to be confused with a mission statement (extending the religious metaphor). Vision is BeOS's leading IRC client. A Shared Vision is a way of reaching consensus about where a group of individuals wants t...

T cell

...ecause they are able to destroy target cells which express specific antigens that they recognize. Helper T...ve at the edge of the thymic cortex . These cells express CD2,CD7 and CD3, but neither CD4 nor CD8 (they are double negative, CD4 - CD8 - cells). In the ear...

Blood type

... B. AB people have both phenotypes because A and B express a special dominance relationship: codominance . T...he rare individuals with Bombay phenotype do not express substance H on their red blood cells and therefore do not bind A or B antigens. Instead, they produc...

Population

...people or organisms per unit of area. Variants may express the population per unit of habitable, inhabited, productive (or potentially productive), or cultivated area. A particular geographic area of land is said to have a carrying capacity , representing the maximum population which it can support. Some ...

Plasmid

...mmonly used to multiply (make many copies of) or express particular genes. There are many plasmids that a...ich took up one or more copies of the plasmid then express (make protein) the gene that confers antibiotic resistance. This is typically a protein which can br...

Morphogenesis

... are competent to respond to Hedgehog because they express the receptor protein Patched (blue in figure to left). Cells with activated Patch receptor make the Wingless protein (red in the figure). Wingless protein acts as an extracelluar morphogen and patterns the adjacent rows of cells by activated its ...

Monoclonal antibody

...cing DNA. One then uses mammalian cell cultures to express this DNA and produce these half-mouse and half-human antibodies. (Bacteria cannot be used for this purpose, since they cannot produce this kind of glycoprotein ). Depending on how big a part of the mouse antibody is used, one talks about chimeric a...

Molecular biology

...ific cell-signaling factors, are available to help express the protein of interest at high levels. Large quantities of a protein can then be extracted from the bacterial or eukaryotic cell. The protein can be tested for enzymatic activity under a variety of situations, the protein may be crystallized so its ...

Malaria

...tain surface proteins which infected blood cells express on their cell surface, causing the blood cells to stick to the walls of blood vessels. These surface proteins known as PfEMP1 are highly variable (atleast 50 variations) and cannot serve as a reliable target for the immune system. By the time the h...

Lyon hypothesis

...re inactived. The X chromosomes that are activated express different coloring genes and lead to their mosaic.... However, there are now reports that women still express many genes from their inactive X chromosomes, and that different women express different genes from ...

Eugenics

...rutes, and plants. We greatly want a brief word to express the science of improving stock, which is by no mea...d have had. The word eugenics would sufficiently express the idea; it is at least a neater word and a more generalised one than viriculture which I once ve...

Morphogenesis

... are competent to respond to Hedgehog because they express the receptor protein Patched (blue in figure to left). Cells with activated Patch receptor make the Wingless protein (red in the figure). Wingless protein acts as an extracelluar morphogen and patterns the adjacent rows of cells by activated its ...

DNA

... which an organism is liable to manufacture or " express " at one or several points in its life using the information of the sequence. The relationship between the nucleotide sequence and the amino-acid sequence of the protein is determined by simple cellular rules of translation , known collectively a...

Developmental biology

...type of cell (epithelial, muscle, neuron, etc) to express different amounts of the possible proteins. The transcription factors are regulated by signal transduction pathways that relay signals from outside of cells to the cell nucleus. Signal transduction pathways often involve receptors , receptor liga...

Biotechnology

...xample of this would include a plant engineered to express a pesticide , thereby eliminating the need for external application of pesticides. The term blue biotechnology has also been used to describe the marine and aquatic applications of biotechnology, but its use is relatively rare. Biotechnology ...

Antibody

..., and IgE constant binding domain receptors it can express on its surface. The antibodies a single B lymphocyte produces can differ in their heavy chain and the B cell often expresses different classes of antibodies at the same time. However, they are identical in their specificity for antigen, conferred by...

Alfred Russel Wallace

...ect specimens in the Amazon Rainforest , with the express intention of gathering facts in order to solve the riddle of the origin of species. Unfortunately, a large part of his collection was destroyed when his ship caught fire and sank while returning to Britain in 1852 . From 1854 to 1862 , he trave...

Allele

...ver, there are exceptions to the way heterozygotes express themselves in the phenotype. One exception is incomplete dominance (sometimes called blending inheritance ) when alleles blend their traits in the phenotype . An example of this would be seen if, when crossing flowers with codominant "blue" and...