| trans Golgi network | <cell biology> A complex of membranous tubules and vesicles, near the trans face of the Golgi, which is thought to be a major intersection for intracellular traffic of vesicles. (18 Nov 1997) |
|---|---|
| trans-Golgi reticulum | That part of the Golgi apparatus that takes newly processed proteins and delivers them to secretory vesicles that will fuse with other biomembranes (e.g., the plasma membrane). (05 Mar 2000) |
| trans-octaprenyltranstransferase | <enzyme> Level of isopentenyl diphosphate-magnesium(ipp-mg) is decisive in affecting the chain length of the products of prenyltransferase reaction Registry number: EC 2.5.1.11 Synonym: solanesyl diphosphate synthase, solanesyl pyrophosphate synthetase (26 Jun 1999) |
| trans-pentaprenyltranstransferase | <enzyme> From micrococcus luteus b-p26; composed of 2 components; requires all-trans farnesyl or all-trans-geranylgeranyl pyrophosphate Registry number: EC 2.5.1.33 Synonym: all-trans-hexaprenylpyrophosphate synthase, hexaprenyldiphosphate synthetase, trans-pentaprenyltransferase, hexaprenylpyrophosphate synthetase (26 Jun 1999) |
| trans-retinal | The orange retinaldehyde resulting from the action of light on the rhodopsin of the retina, which converts the 11-cis-retinal component of the rhodopsin to all-trans-retinal plus opsin. Synonym: trans-retinal, visual yellow. (05 Mar 2000) |
| trans splicing | <molecular biology> Relating to RNA splicing of two different pre mRNA molecules together. Seems to rely on intron like sequences. Contrasts with the normal cis splicing of conventional RNA molecules. (19 Jan 1998) |
| trans-splicing | Formation of spliced products containing portions of two different transcripts. (05 Mar 2000) |
| CIS | <abbreviation> Carcinoma in situ. (05 Mar 2000) |
| cis- | 1. <prefix> Prefix meaning on this side, on the near side; opposite of trans-. 2. <genetics> A prefix denoting the location of two or more genes on the same chromosome of a homologous pair, in coupling. 3. <chemistry> A form of geometric isomerism in which similar functional groups are attached on the same side of the plane that includes two adjacent, fixed carbon atoms (e.g., the 2-and 3-OH groups of ribofuranose) in a ring structure. Identical functional groups on the same side of the double bond are cis-. When the four moieties attached to the carbons of the double bond are all different, then the E/Z nomenclature has to be followed. See: entgegen, zusammen. Origin: L. (20 Jun 2000) |
| cis-1,2-dihydrobenzene-1,2-diol dehydrogenase | <enzyme> See also EC 1.3.1.20 (trans-1,2-dihydrobenzene-1,2-diol dehydrogenase; both enzymes catalyze the conversion of benzene dihydrodiol to catechol and may also have hydroxysteroid dehydrogenase activity Chemical name: cis-1,2-dihydroxycyclohexa-3,5-diene (nad) oxidoreductase Registry number: EC 1.3.1.19 Synonym: cis-benzene glycol dehydrogenase, cis-diol dehydrogenase, benzene dihydrodiol dehydrogenase, bedd gene product, nad+-dependent cis-benzene dihydrodiol dehydrogenase, todd gene product (26 Jun 1999) |
| cis-3-chloroacrylic acid dehalogenase | <enzyme> Specific for conversion of cis-3-chloroacrylic acid to muconic saemialdehyde (3-oxopropionic acid); 48 amino-terminal amino acid sequence given in first source Registry number: EC 3.8.1.- Synonym: cis-3caa dehalogenase (26 Jun 1999) |
| cis-aconitic acid | Dehydration product of citric acid; an enzyme-bound intermediate in the tricarboxylic acid cycle. (05 Mar 2000) |
| cis acting | <molecular biology> Having to do with a genetic element (such as a promoter or other regulatory locus) having an effect (like promotion or suppression) on two unrelated targets (such as genes) on the same chromosome as a result of their relative positions on the chromosome. A gene which regulates the transcription into mRNA of other genes nearby on the same chromosome by binding protein transcription factors which are necessary to turn transcription on or off. (09 Oct 1997) |
| cis-acting locus | A section of DNA that affects the activity of DNA sequences on that same molecule of DNA. (05 Mar 2000) |
| cis-acting protein | A protein that acts on the molecule of DNA from which it was expressed. (05 Mar 2000) |