(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.
Headstall
Definition:
(n.) That part of a bridle or halter which encompasses the head.