(n.) A nonplane curve whose tangents are all equally inclined to a given plane. The common helix is the curve formed by the thread of the ordinary screw. It is distinguished from the spiral, all the convolutions of which are in the plane.
(n.) A caulicule or little volute under the abacus of the Corinthian capital.
(n.) The incurved margin or rim of the external ear. See Illust. of Ear.
(n.) A genus of land snails, including a large number of species.
Example Sentences:
(1) The presence of a few key residues in the amino-terminal alpha-helix of each ligand is sufficient to confer specificity to the interaction.
(2) The elongation of helix III with the addition of helix II at the N-terminus somewhat stabilizes the ordered structure.
(3) The C-terminal sequence contains an amphiphilic alpha-helix of four turns which lies on the surface of the beta-barrel.
(4) The chiral intercalators, at micromolar concentrations, inhibit the reaction of EcoRI, but for each enantiomeric pair it is the lambda enantiomer, which binds only poorly to a B-DNA helix, that inhibits EcoRI preferentially.
(5) The melting profile exhibited two transitions--one at about 35 degrees C and one above 50 degrees C. Our spectral data showed that helices I and II were stable during the first transition, and agreed with other data that helix III was the most likely helix to have melted.
(6) The helix axes, penetrating the hydrophobic region of the bilayers, were oriented neither parallel nor perpendicular to the membrane normal.
(7) The structure of the Z-helix antigen was confirmed by circular dichroism (CD) and U.V.
(8) Conformational predictions based on these sequences confirm their structural homology and indicate the probable existence of two beta-turns, one beta-chain and a long alpha-helix in them.
(9) The nogalose and aminoglucose sugars lie in the minor and major grooves, respectively, of the distorted B-DNA double helix.
(10) The latter, which is external and solvent accessible, is associated with a distortion in the alpha-helix centered around Tyr33 which consists of a significant increase in the CO(i-4)-N(i) and CO(i-4)-NH(i) distances relative to those in the rest of the helix, as well as a significant departure in the phi, psi angles of Tyr33 relative to regular helical geometry.
(11) The AFB1 moiety is face-stacked in the major groove with its long axis approximately perpendicular to the helix axis.
(12) MP8 also was conformed as an alpha-helix, but was amphipatic in the sense that the N-terminal half of the molecule was hydrophilic and the C-terminal half hydrophobic.
(13) A lectin, Helix pomatia agglutinin (HPA), was planted at the surface of rat GEN by the perfusion of the isolated left kidney with neuraminidase (NRD) and HPA.
(14) As a basis for the discussion a possible structure for the DNA complex of the phenylated neutral red is considered in which the extra phenyl ring at N-5 of the phenazinium system, protrudes into the large groove of the DNA helix while the tricyclic part of the ligand is inserted between the DNA base-pairs.
(15) The opsin mutations included reversal of a charged pair conserved in all G protein-coupled receptors at the cytoplasmic border of the third transmembrane helix (mutant CD1), replacement of 13 amino acids in the second cytoplasmic loop (mutant CD2), and deletion of 13 amino acids from the third cytoplasmic loop (mutant EF1).
(16) The remaining 26 independently isolated second-site suppressor mutations all mapped within the amino-terminal DNA binding domain of LexA, at positions 22 (situated in the turn between helix 1 and helix 2) and positions 57, 59, 62, 71 and 73.
(17) In subsequent steps, unassociated Y' directs the synthesis of the complementary oligopurine (R') strand forming a new double helix Y'R' that may direct the synthesis of an oligopyrimidine strand, Y, that is expected to be identical to the first strand that started the whole sequence.
(18) Z-DNA antigen was prepared against poly(dG-dC).poly(dG-dC), which had been converted to the Z-helix conformation in high salt and then stabilized by bromination.
(19) Incubation and heating of the polymers in 1 mM Mn2+ caused the spectral shift reported for the left-handed Z-DNA conformation in the alternating copolymer and the change reported for the triple helix in the homopolymer.
(20) To investigate the ability of a protein to accommodate potentially destabilizing amino acid substitutions, and also to investigate the steric requirements for catalysis, proline was substituted at different sites within the long alpha-helix that connects the amino-terminal and carboxyl-terminal domains of T4 lysozyme.
Rim
Definition:
(n.) The border, edge, or margin of a thing, usually of something circular or curving; as, the rim of a kettle or basin.
(n.) The lower part of the abdomen.
(v. t.) To furnish with a rim; to border.
Example Sentences:
(1) Two cases of posterior lumbar vertebral rim fracture and associated disc protrusion in adolescents are presented.
(2) Thirteen patients had had a posterior dislocation with an associated fracture of the femoral head located either caudad or cephalad to the fovea centralis (Pipkin Type-I or Type-II injury), one had had a posterior dislocation with associated fractures of the femoral head and neck (Pipkin Type III), two had had a posterior dislocation with associated fractures of the femoral head and the acetabular rim (Pipkin Type IV), and three had had a fracture-dislocation that we could not categorize according to the Pipkin classification.
(3) Both adiphenine.HCl and proadifen.HCl form more stable complexes, suggesting that hydrogen bonding to the carbonyl oxygen by the hydroxyl-group on the rim of the CD ring could be an important contributor to the complexation.
(4) If a tear is found, remove all unstable meniscal fragments, leaving a rim, if possible, especially adjacent to the popliteus recess, and then proceed to open cystectomy.
(5) But officials warned the rains may not reach the heart of the Rim fire.
(6) RIM has always struggled to explain to the authorities that, unlike most other companies, it technically cannot access or read the majority of the messages sent by users over its network.
(7) Early complications included disc entrapment against the ventricular wall in three cases, wedging of chorda between disc and valve rim in two and posterior perforation of the left ventricle in three patients.
(8) On CT scans the tumor thrombus usually appeared as an endoluminal filling defect surrounded by a rim of contrast material.
(9) The usual approach to the inferior orbit has been through a subciliary skin incision and dissection of a skin flap to the orbital rim.
(10) This permitted employment of cast combined crowns with wide perigingival metal rims to support the clasp dentures to make them look better when supplying 73 patients with partial removable dentures.
(11) Two patients had a second arthroscopy, and no evidence of instability of the peripheral rim was found.
(12) Fold the edges of the baking parchment down over the rim of the basin.
(13) Healing of rim widths to 5 mm can be obtained with these methods.
(14) In young people the basic histological pattern of clusters, composed of cores of chief cells with surrounding rims of sustentacular cells, has commonly superimposed on it prominence of the dark variant of chief cells.
(15) A hypointense vascular rim was noted on MR in seven of 13 extracanalicular acoustic tumors and in three of seven meningiomas.
(16) It was suggested that the differences in rim area were already present prior to the manifestation of the VFD.
(17) "I'm interested to see what RIM's new OS has in store, and hope I'll be able to sample some of its features on the 9900.
(18) MRI delineated discrete lesions, typical of cavernous angiomas, with a mixed hyperintense, reticulated, central core surrounded by a hypointense rim.
(19) When pointing to its importance in retention, it applies to the rim margins, its relation to the support and its role in the valve closure of the upper total prosthesis.
(20) Enhanced sonograms were classified into five patterns according to the relative changes of the echo levels between the tumor and the nontumorous parenchyma of the liver as a result of enhancement: hyperechoic change, isoechoic change, hypoechoic change with hyperechoic rim (rim sign), marginal spotty hyperechoic change, and internal spotty hyperechoic change.