(n.) A rope or strap, with or without a headstall, for leading or tying a horse.
(n.) A rope for hanging malefactors; a noose.
(v. t.) To tie by the neck with a rope, strap, or halter; to put a halter on; to subject to a hangman's halter.
Example Sentences:
(1) When the III between short intromissions from a rested male was experimentally increased to 100 s by use of a halter and lead device, the duration of lordosis was significantly less than that displayed by females paired with control males (8-s III) and virtually the same as that displayed by females paired with males that produced only long intromissions.
(2) The Dipteran flight appendages, the wings and halteres, develop from larval imaginal discs that also produce other sections of the second and third thoracic adult body segments.
(3) 15 minutes later a halter with two long ropes is put on to hold up the animals' heads after they lay down.
(4) Change in the pattern of aldehyde oxidase in bithorax mutants signals alteration in gene expression which at least for this particular enzyme correlates well with the morphological transformation from haltere to wing.
(5) In wild-type Drosophila melanogaster larvae, the Ultrabithorax (Ubx) gene is expressed in the haltere imaginal discs but not in the majority of cells of the wing imaginal discs.
(6) As expected, the pbx1 mutation led to reduced Ubx expression in the posterior compartment of the haltere disc; surprisingly, pbx1 also led to altered expression of the en protein near the compartment border in the central region of the disc.
(7) Two types of cuticular strain detectors, the campaniform sensilla on the haltere of the blowfly, Calliphora vicina, and the slit sensilla on the tibia of the spider, Cupiennius salei, were investigated.
(8) Contemporaneous accounts report his body was found among others slain, a halter was thrown around his neck, his naked body was slung over a horse with head, arms and legs dangling, and he was bought to a church in Leicester and irreverently buried.
(9) This can be readily determined by treating torticollis initially with head halter traction of three to four pounds' weight and observing whether it resolves in five of seven days.
(10) The rapid death of the flies may be ascribed to one or more of the following reasons: (i) reverse migration of numerous microfilariae from the expanded- to the tubular-part of the mid-gut, where they cause serious injury and disintegration of the gut epithelium; (ii) abrasive damage to the stomach epithelial cells by the invading microfilariae with occasional release of the gut contents into the haemocoele; (iii) interruption of the formation of the peritrophic membrane, particularly at its anterior and posterior ends, with subsequent failure of the flies to digest the blood in the stomach; (iv) passage of large amounts of parasitized blood from the stomach backwards into the hind-gut, leading to its mechanical obstruction and (v) invasion and injury of various organs of the fly, among them the ventral nerve-cord, brain, optic nerve, eye, halteres, fat-body and flight musculature by excessive numbers of microfilariae.
(11) Less frequent defects included fused or missing mouth parts and missing halteres.
(12) ap is presumably required for transcriptional regulation of genes involved in wing and haltere development.
(13) The dorsal and ventral histoblast nests within the first abdominal (A1) segment are shown not to be segmentally homologous with the metathoracic (T3) haltere and leg discs, respectively, since they occur at distinct dorso-ventral locations during normal development and can be found together within the same segment in mutants of the Bithorax complex (BX-C) where T3 is transformed towards A2-A4 or A1 towards T3.
(14) Distribution of the enzyme aldehyde oxidase in transformed haltere discs from the homoeotic bithorax series of mutants was investigated by histochemical means.
(15) The transformation of pT2 cells (wing) toward pT3 cells (haltere) is seen in adults carrying eight doses of wild type Ubx and bxd by decreasing the amount of the bithorax complex (BX-C) regulator Polycomb (Pc).
(16) We use a mutant (Haltere-mimic) to show that sequences that normally restrict segmental expression of Ubx in the ectoderm are located downstream from the RNA leader.
(17) The postbithorax (pbx) mutant, which transforms the posterior haltere into a structure resembling the posterior wing blade, reveals an aldehyde oxidase staining pattern in the haltere disc characteristic of the posterior side of the wing disc pouch.
(18) It is shown here that the transformed haltere disc closely resembles the previously established pattern in the wing disc with respect to aldehyde oxidase distribution.
(19) While circulating insulin levels may at times appear to be normal or even elevated in patients with NIDDM, depending on the control group for comparison and the glucose level at which subjects are studied, a profound impairment of pancreatic B-cell function is characteristic of NIDDM and contributes to the hyperglycemia in this condition (Halter, et al., 1985).
(20) We also report an exceptional vg allele (vg83b27) that produces an extreme wing and haltere phenotype, but which defines a second vg complementation unit.
Headpiece
Definition:
(n.) Head.
(n.) A cap of defense; especially, an open one, as distinguished from the closed helmet of the Middle Ages.
(n.) Understanding; mental faculty.
(n.) An engraved ornament at the head of a chapter, or of a page.
Example Sentences:
(1) Three of these new changes were in the N-terminal domain (headpiece) of repressor, with one change in the core domain at aa 99.
(2) Further, 110K possesses an approximately 10 x 10(3) Mr terminal polypeptide segment that is immunologically related to villin headpiece.
(3) Our results show that essential domains of villin required to induce the growth of microvilli and F-actin redistribution are present in the first half of the core and in the headpiece.
(4) In contrast, the 31P NMR spectrum of the mutant operator, d(TATAGAGCGCTCATA)2, wild-type headpiece complex was significantly perturbed relative to the wild-type repressor-operator complex.
(5) The results suggest that at least certain hybrid protofilaments containing less than four headpieces are accepted in the filament.
(6) The 31P chemical shifts of the phosphates of a third mutant operator, d(TCTGAGCGCTCAGA)2, showed no perturbations upon addition of the wild-type headpiece.
(7) The conserved repeats are found in other actin-severing proteins but not in the villin headpiece.
(8) These results are consistent with the structure determined by NMR and molecular dynamics calculations of the NH2-terminal headpiece-symmetric operator complex (Lamerichs, R.M.J.N., Boelens, R., van der Marel, G.A., van Boom, J.H., Kaptein, R., Buck, F., Fera, B., and Rüterjans, H. (1989) Biochemistry 28, 2895-2991; de Vlieg, J., Berendsen, H.J.C., and van Gunsteren, W.F.
(9) D88, the headpiece domain fragment, binds only to the headpiece of intact desmin.
(10) Two-dimensional nuclear Overhauser effect (2D NOE) spectra of headpiece-operator complexes were taken in both D2O and H2O solutions.
(11) Ultimately, the headpiece was completely eliminated and the asymmetrical tonic neck reflex maintained a zero level of occurrence during lunch periods.
(12) The ATP binding site appears to be located in the headpiece and is made up from a series of loop sequences connecting alternating alpha helices and beta strands.
(13) The results are compared with earlier photo-CIDNP measurements on a complex of headpiece with poly[d(AT)] and with a model derived from a 2D NMR study on a lac headpiece-operator complex.
(14) lac repressor can be dissected by trypsin into a homogenous tetrameric core (accounting for residues 60 to 347), carrying inducer binding activity, and the monomeric amino-terminal peptides ("headpieces") accounting for residues 1 to 59 and 1 to 51, respectively.
(15) A centrally located highly alpha-helical domain of about 310 residues well-conserved in sequence principles and length is flanked by the highly variable sequences of the non-alpha-helical headpiece and tailpiece.
(16) delta may be a stalk which connects the Fl headpiece to the membrane, since the attachment of ECFl to the membrane exhibited an absolute dependence on delta.
(17) On the basis of the established dependence, curves were plotted for the probability forecast of the state of the injured person's consciousness depending on the rate at which the blow occurred and its localization, which may be used in the elaboration of methods for the appraisal of protective helmets and headpieces.
(18) Its performance on three data sets, derived from the lac-repressor headpiece of E. coli, sperm whale myoglobin, and domain 1 of bacteriophage T4 lysozyme, indicates that there may be families of related conformations that are consistent with the experimental data.
(19) The interaction of a symmetric lac operator duplex, d(TGTGAGCGCTCACA)2, with the N-terminal 56-residue headpiece fragment of the lac repressor protein was monitored by 31P NMR spectroscopy.
(20) We report here the total assignment of proton 1H and nitrogen 15NH backbone resonances of this headpiece in the free state.