| controlling element | A transposon which, when inserted into or removed from a gene, breaks the chromosome and/or causes mutations. (09 Oct 1997) |
|---|---|
| copia element | A group of transposons whose base sequences are closely related to each other, found in the genome of the fruit fly genus Drosophila. (09 Oct 1997) |
| polarizing element | <microscopy> A general term for a device for producing or analysing plane-polarized light. It may be a Nicol prism, some other form of calcite prism, a reflecting surface, or a polarizing filter. (05 Aug 1998) |
| myelin basic protein | <protein> Major component of the myelin sheath in mammalian CNS. Used as an antigen will induce a allergic encephalitis, possibly a model for some neurodegenerative disorders. (18 Nov 1997) |
| myelin basic protein kinase | <enzyme> Protein from pig brain activates ATP-mg-dependent protein phosphatase; a protein tau kinase; a multisubstrate kinase; in texts written as f subscript a Registry number: EC 2.7.1.- Synonym: protein phosphatase activator fa, glycogen synthase kinase 3, protein kinase f(a), gsk-3, gsk-3alpha, kinase f(a), gsk-3beta, mds1 gene product, p63(samk), src-activated mbp kinase, p63(mapk) (26 Jun 1999) |
| myelin basic proteins | A group of 7 proteins produced from a single gene by alternate splicing found in central and peripheral nervous system myelin. The major basic protein (mbp) has long been of interest because it is the antigen, that, when injected into an animal, elicits a cellular immune response that produces the CNS autoimmune disease called experimental allergic encephalomyelitis (encephalomyelitis, allergic). In the peripheral nervous system, myelin basic protein 18.5 kD is often referred to as the p1 protein. (12 Dec 1998) |
| haematoxylin-malachite green-basic fuchsin stain | <technique> A stain for epoxy resin-extracted sections; semi-thick sections have their plastic dissolved out and the residual tissue is stained sequentially with the various dyes; nuclei and astrocytes are purplish-pink and myelin, lipid droplets, nucleoli, and oligodendrocytes are bright blue-green. (05 Mar 2000) |
| heat-shock response element | <cell biology, protein> The nucleotide sequence, CNNGAANNTCCNG, which is in the promoter region of the heat-shock genes. When the animal is exposed to certain types of stress such as a sudden rise in temperature, the first thing that happens to activate these genes is the binding of the HSE by a transcriptional enhancer protein. (09 Oct 1997) |
| serum response element | Dyad symmetry element bound by serum response factor to control the expression of c fos. (18 Nov 1997) |
| neutral element | An element of the zero group of the periodic system comprising the rare gases, He, Ne, Ar, Kr, Xe, Rn. Synonym: noble element. (05 Mar 2000) |
| noble element | A metal that cannot be oxidised by heat alone, nor readily dissolved by acid; e.g., gold, platinum. Synonym: noble element. (05 Mar 2000) |
| dyad symmetry element | Dyad symmetry element bound by serum response factor to control the expression of c fos. (18 Nov 1997) |
| Is element | Mobile nucleotide sequences that occur naturally in the genomes of bacterial populations. When inserted into bacterial DNA, they inactivate the gene concerned, when they are removed the gene regains its activity. Closely related to transposons and range in size from a few hundred to a few thousand bases, but are usually less than 1500 bases. (18 Nov 1997) |
| electronegative element | An element whose atoms have a tendency to accept electrons and form negative ions (e.g., oxygen, sulfur, chlorine, etc.). (05 Mar 2000) |
| electropositive element | <chemistry> An element whose atoms have a tendency to lose electrons and form positive ions (e.g., sodium). (05 Mar 2000) |