| cis-prenyl transferase | <enzyme> Involved in dolichol biosynthesis Registry number: EC 2.5.1.- Synonym: cis-prenyltransferase (26 Jun 1999) |
|---|---|
| cis-toluene dihydrodiol dehydrogenase | <enzyme> Nad specific dehydrogenase; reduces ring structure Chemical name: 1,2-dihydroxy-3-methylcyclohexa-3,5-diene dehydrogenase Registry number: EC 1.3.- Synonym: ctd dehydrogenase (26 Jun 1999) |
| cis-trans-isomerases | <enzyme> Enzymes that catalyze the rearrangement of geometry about double bonds. Registry number: EC 5.2 (12 Dec 1998) |
| cis trans test | <molecular biology> The complementation test with two or more interacting genes placed in cis and in trans relationships to each other. A double mutant genome is used in the cis test made from the two single mutant genomes used in the trans test by recombination. If the wild type phenotype is restored by both cis and trans arrangements it is concluded that the two mutations are in different genes and hence that the phenotype is determined by more than one gene. If the trans test is negative and the cis positive this means that the two mutations are in the same gene. If both tests are negative then at least one of the mutations must be dominant. Thus the double test provides a means of fine mapping of genes. A lab test which is used to determine whether two mutations of different genes which affect the same phenotype are on the same functional unit (indicating a cis configuration of the mutated genes) or on different functional units (indicating a trans configuration of the mutated genes). (A functional unit can be a chromosome.) The test is done by mating an individual that has one of the mutations to an individual that has the other one, and observing whether their offspring have the mutant phenotype. If the offspring do not have the mutant phenotype, then the genes are known to be trans, because the offspring have normal copies of each mutant gene on the different functional units which are able to genetically complement each other. If the offspring do have the mutant phenotype, then the genes are known to be cis, because the offspring will always inherit at least one of the mutant genes on the one functional unit, resulting in the mutant phenotype. (09 Oct 1997) |
| 11-cis-retinal | The isomer of retinaldehyde that can combine with opsin to form rhodopsin; it is formed from 11-trans-retinal by retinal isomerase. Synonym: neoretinal b. (05 Mar 2000) |
| 11-cis-retinol | Retinol with cis configuration at the 11-position (carotenoid numbering) or 5'-position (retinol numbering) of the side chain; an intermediate in the vision cycle. Synonym: neoretinene B. (05 Mar 2000) |
| 9-cis-retinol dehydrogenase | <enzyme> Catalyses oxidation of 9-cis-retinol to 9-cis-retinaldehyde; does not catalyze oxidation of all-trans-retinol; genbank u89717 Registry number: EC 1.1.1.- Synonym: retinol dehydrogenase (9-cis) (26 Jun 1999) |
| anatomical position | The erect position of the body with the face directed forward (skull aligned in orbitomeatal or Frankfort plane); the arms at the side and the palms of the hands directed forward; the terms posterior, anterior, lateral, medial, etc., are applied to the parts as they stand related to each other and to the axis of the body when in this position. (05 Mar 2000) |
| Bozeman's position | Knee-elbow position, the patient being strapped to supports. (05 Mar 2000) |
| Valentine's position | A supine position on a table with double inclined plane so as to cause flexion at the hips; used to facilitate urethral irrigation. (05 Mar 2000) |
| mandibular hinge position | Any position of the mandible which exists when the condyles are so situated in the temporomandibular joints that opening or closing movements can be made on the hinge axis. (05 Mar 2000) |
| genucubital position | A prone position resting on the knees and elbows, assumed for gynecologic or rectal examination or operation. Synonym: genucubital position. (05 Mar 2000) |
| genupectoral position | A prone posture resting on the knees and upper part of the chest, assumed for gynecologic or rectal examination. Synonym: genupectoral position. (05 Mar 2000) |
| Casselberry position | A prone position assumed when drinking, after intubation, in order to prevent the entrance of fluid into the tube. (05 Mar 2000) |
| Mayo-Robson's position | A supine position with a thick pad under the loins, causing a marked lordosis in this region; used in operations on the gallbladder. (05 Mar 2000) |