(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.
Helmet
Definition:
(n.) A defensive covering for the head. See Casque, Headpiece, Morion, Sallet, and Illust. of Beaver.
(n.) The representation of a helmet over shields or coats of arms, denoting gradations of rank by modifications of form.
(n.) A helmet-shaped hat, made of cork, felt, metal, or other suitable material, worn as part of the uniform of soldiers, firemen, etc., also worn in hot countries as a protection from the heat of the sun.
(n.) That which resembles a helmet in form, position, etc.
(n.) The upper part of a retort.
(n.) The hood-formed upper sepal or petal of some flowers, as of the monkshood or the snapdragon.
(n.) A naked shield or protuberance on the top or fore part of the head of a bird.
Example Sentences:
(1) It follows that he would not allow a biker to give evidence while wearing a crash helmet with the visor down.
(2) The design of motor cycle helmets has been changing over the years and at the present time there are two basic types in popular use: "full-face" and "jet" helmets.
(3) Ultimately, we hope such a program will increase helmet use and consequently reduce morbidity and mortality from head injury in Indiana's children.
(4) The study showed surprising results: in the majority of cases, the helmet does not protect the wearer, but instead intensifies the damage caused by the bullet.
(5) 9.18am GMT Johnson says he does not wear his helmet all the time when he cycles.
(6) The front door is open; outside, a line of police carrying riot helmets files past.
(7) Fifty-seven percent of riders were wearing helmets during the mishap.
(8) The protective performance of the helmet shells, impact absorbing liners, and retention systems were evaluated, and the severity of the impacts sustained by the helmets was simulated in the test laboratory.
(9) Members of the elite police squad wearing helmets came running out of the building and a police union representative at the cordon around the area shouted: "He's dead, he's dead."
(10) Ten subjects took part in the trial in a tropical environment by wearing helmets repeatedly (6 h a day) for one month.
(11) Here's one entry: 1995: The government is full of jack-booted thugs in bucket helmets.
(12) The analysis of the results allowed a conclusion that the latter are concerned with a discoupling effect of substances on oxidative phosphorylation in mitochondria of helmets and their host.
(13) To better understand motion in the cervical spine related to helmet wearing and removal, normal volunteers underwent videotaped fluoroscopy during helmet removal and lateral spine X-rays in various positions.
(14) We describe the mechanics of a multifaceted campaign undertaken to alter this situation, involving a coalition of health, bicycle, and helmet industry organizations.
(15) Japan's prime minister, Shinzo Abe, wearing a red helmet, during a tour of the Fukushima Daiichi plant.
(16) This article presents 1990 self-reported data from U.S. students in grades 9-12 regarding the prevalence of three behaviors that reduce the risk for injuries from motor-vehicle crashes-safety-belt use, motorcycle-helmet use, and bicycle-helmet use.
(17) The helmet usage was analyzed in two clinical study populations including 200 injured from the county of Västerbotten from two periods 1979-1980 and 1985-86.
(18) These data support the need for both increased public education regarding helmet use and mandatory helmet use legislation.
(19) The relative frequency of serious head injury was highest for drivers not wearing helmets who were involved in collisions at low or high speeds.
(20) Women's lacrosse is potentially hazardous because, unlike men's lacrosse, helmets and face masks are not required.