(a.) Indented with small concave curves, as the edge of a bordure, bend, or the like.
Example Sentences:
(1) An ectopic expression assay in Drosophila embryos was used to investigate the roles of pair-rule segmentation genes in the spatial regulation of the segment-polarity gene, engrailed (en).
(2) Engrailed has been suggested to play an important role during development by controlling position-specific characteristics in the CNS of the early embryo.
(3) The engrailed gene is required during embryogenesis of Drosophila melanogaster for normal segmental development and for differentiation of posterior compartments.
(4) Genetic analysis in Drosophila has shown that engrailed (en) plays an important role in segmentation and neurogenesis.
(5) The first pattern of expression is in alternating segments followed by expression in every segment, suggesting that engrailed may be responding to pair-rule segmentation gene products.
(6) By contrast, the homeo box within the engrailed gene diverges substantially and, unlike the other homeo boxes, is interrupted by an intervening sequence.
(7) These results indicate that 1) Engrailed-2 expression is suppressed in the most ventral neural tube owing to induction of the floor plate by the notochord, and 2) that the presence of an underlying notochord is not required for correct rostrocaudal expression, suggesting that multiple pathways act in the patterning of the rudiment of the central nervous system.
(8) The crystal structure of a complex containing the engrailed homeodomain and a duplex DNA site has been determined at 2.8 A resolution and refined to a crystallographic R factor of 24.4%.
(9) This early requirement for engrailed does not appear to be a maternal function, and only genetically engrailed embryos displayed these precellular phenotypes.
(10) No other transcribed regions were found up to 16 kb downstream and 48 kb upstream of the engrailed transcription unit, the portion of the genome to which engrailed mutations have been mapped.
(11) Comparison of amino acid sequences between the entire Xenopus En-2 and the Drosophila engrailed proteins confirms conservation of sequences inside as well as proximal to the homeobox and reveals a region of similarity towards the N terminus.
(12) The Drosophila engrailed gene product (En) is a homeodomain-containing protein that contributes to segmental patterning.
(13) These results are discussed in the context of an autoregulatory model for engrailed regulation.
(14) hh expression in epidermal cells is confined to the posterior compartments and coincides precisely with that of engrailed (en).
(15) An enzyme system that accurately initiates transcription of the engrailed gene has been prepared from Drosophila embryos.
(16) We have examples of patches of hairy cells (where we monitor the effect on fushi tarazu (ftz) expression), even-skipped (monitoring ftz) and ftz (monitoring engrailed and Ultrabithorax).
(17) By examining embryonic expression of the mouse engrailed (En) genes, from 8.0 to 9.5 days postcoitum, we demonstrate that Wnt-1 primarily regulates midbrain development.
(18) This gene, which encodes a transmembrane protein, is initially expressed in a generalized way at blastoderm, but later stops being transcribed in cells expressing the engrailed gene, and even later in cells in the middle of the parasegment.
(19) Autoregulation graduates to wingless independence, but is transient, and is superseded by an engrailed-independent mode of maintenance.
(20) It appears to control morphogenesis by regulating the expression of the segmentation gene engrailed (en), and by autoregulating its own expression (M. Frasch and M.L., in preparation).
Semicircle
Definition:
(n.) The half of a circle; the part of a circle bounded by its diameter and half of its circumference.
(n.) A semicircumference.
(n.) A body in the form of half of a circle, or half of a circumference.
(n.) An instrument for measuring angles.
Example Sentences:
(1) The form of the hard palate is similar to a semicircle in the frontal cut.
(2) The loudspeakers, 15 deg apart, were arranged in a semicircle (0-270-180 deg, azimuth).
(3) In the other pattern, the inducing semicircles were shifted in phase along their diameter and their endpoints were aligned along the contour.
(4) Within the whole target volume yD remains nearly constant when irradiated with all 60 beams, whereas considerable changes were found for irradiations with 31 beams coming from a semicircle.
(5) In targeting Hindus, Sikhs, Jews and those of Tamil ethnicity, the Tories are once again courting a suburban semicircle of boroughs in north London that traditionally are more likely to vote Conservative.
(6) Reducing the salience of the illusory contour, whether by scrambling the contour, or by decreasing the number or the contrast of inducing semicircles, systematically increased discrimination thresholds.
(7) Osteoperiosteal corticocancellous grafts are harvested from the iliac wing, then bent into a semicircle with the periosteum on the inside and inserted between the resected vertebral pedicles where they act as a base for further grafting.
(8) A useful method of treatment in these cases is the marginal, lamellar keratoplasty, which, according to the type of involvement, can take the shape of a sector, ring, horseshoe, or semicircle.
(9) There was a characteristic pattern of activity consisting of small, medium-size, or large distinct granules often distributed in a semicircle in the cytoplasm, but sparing the nucleus of hairy cells.
(10) We report a case of relatively diffuse nontransmural infarction demonstrated by a semicircle of 99mTc-PYP activity which significantly overlapped 201Tl uptake on the SPECT study.
(11) The algorithm developed here is to reduce interactively a multidimensional symptom space to sectorial regions representing each disease in a semicircle using the modified constellation graph method.
(12) This method enables us to classify patients using the angle in the semicircle as a single classifying parameter with an accuracy of about 90%, that is, with little overlapping between disease sectors.
(13) Its transitional stage is a curved semicircle having a form of a distended spiral coil; that reflects an uneven growth of the organ in the human embryogenesis.
(14) The cupboard door came open, Martensen was dragged out and beaten by a dozen officers standing in a semicircle around him.
(15) They are situated in the subserous tela along the anterior and posterior semicircles of the organ.
(16) The CGL of the buffalo was convex, swung in a semicircle around the thalamus and was covered by the fibres of the optic tract.
(17) The hypothesis is presented that a sheet of internal scar is primarily responsible for raising the skin inside the semicircle.
(18) The tube-camera-unit rotates in a semicircle in 5 to 6 seconds around a skull placed in the isocentrum.
(19) The posterior semicircle of the sphincter is located higher than the anterior one.
(20) The anterior capsular tear has a smooth circular edge at the intersection of the two semicircles of the capsulorhexis, while a triangular flap directed towards the center of the pupil is often formed at 12 o'clock.