| e | <radiobiology> Symbol for the electron, for the unit electric charge (e = 1.6x10^-19 coulombs), and for Euler's fundamental mathematical constant e = 2.7182818284590452353. <radiobiology> Variable typically used for Energy or Electric Field (usually in vector notation in the latter case, which is meant is usually clear from context, when both are used in the same place the energy is usually represented as u instead of E.) (09 Oct 1997) |
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| E classification | <biochemistry> Classification of enzymes based on the recommendations of the Committee on Enzyme Nomenclature of the International Union of Biochemistry. The first number indicates the broad type of enzyme (1 = oxidoreductase, 2 = transferase, 3 = hydrolase, 4 = lyase, 5 = isomerase, 6 = ligase (synthetase)). The second and third numbers indicate subsidiary groupings and the last number, which is unique, is assigned arbitrarily in numerical order by the Committee. (08 Mar 2000) |
| E face | In freeze fracture the plasma membrane cleaves between the acyl tails of membrane phospholipids, leaving a monolayer on each half of the specimen. The E face is the inner face of the outer lipid monolayer. From within the cell this is the view that you would have of the outer half of the plasma membrane if the inner layer could be removed. The complementary surface is the P face (the inner surface of the inner leaflet of the bilayer). E stands for ectoplasmic, P for protoplasmic: not terms that are in common usage! (18 Nov 1997) |
| E rosette | The adherence of erythrocytes to cells. Sheep erythrocytes will adhere spontaneously to human T-cells, forming rosettes. (05 Mar 2000) |
| E rosettes | <haematology> The clustering of sheep erythrocytes around a leucocyte or other cell. E rosette formation is used as a marker for T lymphocytes of humans and most mammals, in this case erythrocytes are untreated, compared with other rosette tests such as EA where erythrocytes have antibody bound to their surface. (06 Mar 1998) |
| E-cadherin | <protein> Glycoprotein (120 kD) originally defined as the antigen responsible for eliciting antibodies capable of blocking compaction in early mouse embryos (at the morula stage) and inhibiting calcium dependent aggregation of mouse teratocarcinoma cells. May be the mouse equivalent of LCAM, the chick cell adhesion molecule. (18 Nov 1997) |
| e-coil | <radiobiology> The plasma current driving (Ohmic Heating) coil in a Doublet device. Ideally the E-coil makes no magnetic field in the confinement system. (09 Oct 1997) |
| E-LAM | <abbreviation> Endothelial-leukocyte adhesion molecule. (05 Mar 2000) |
| e-layer | <radiobiology> Cylinder of relativistic electrons gyrating in a magnetic field, which produces a self-field strong enough to dominate the externally applied field and produce a field-reversal (where the B field changes sign) in the system. See: Field-Reversed Configuration, Field-Reversed Pinch. (09 Oct 1997) |
| E-M syndrome | <syndrome> A complex systemic syndrome with inflammatory and autoimmune components that affect the skin, fascia, muscle, nerve, blood vessels, lung, and heart. The varied symptoms include severe muscle pain and abnormally high numbers of eosinophils. This disease has presented itself only in people taking the amino acid l-tryptophan and it is believed that a specific impurity (probably stemming from a genetically engineered bacterial strain) in lots of l-tryptophan made by a single manufacturer may be the cause of the syndrome. (12 Dec 1998) |
| E-rosette test | A test to identify T lymphocytes by mixing purified blood lymphocytes with serum and sheep erythrocytes; rosettes of erythrocytes form around human T lymphocytes on incubation. (05 Mar 2000) |
| e-selectin | Cell adhesion molecule and CD antigen that mediates neutrophil, monocyte, and memory T-cell adhesion to cytokine-activated endothelial cells. E-selectin recognises sialylated carbohydrate groups related to the lewis x or lewis a family. (12 Dec 1998) |
| E. Coli | <bacteria> The archetypal bacterium for biochemists, used very extensively in experimental work. A rod shaped gram-negative bacillus (0.5 x 3-5 m) abundant in the large intestine (colon) of mammals. Abbreviation: E. Coli (18 Nov 1997) |
| E. Coli enteritis | <gastroenterology, pathology> A form of gastroenteritis that is through travel to developing countries. most often caused by a toxigenic E. Coli bacteria. Other causative agents include: Shigella, Vibrio parahaemolyticus, Rotavirus, Giardia and amoebas. Symptoms include diarrhoea, vomiting, abdominal pain and anorexia. (10 Nov 1998) |
| E1 | Symbol for estrone. (05 Mar 2000) |