(1) The rate-limiting step for O2, NO, and isonitrile binding to all five proteins is ligand migration up to the initial geminate state, and the rate of this process determines the overall bimolecular association rate constant for these ligands.
(2) Analysis of the effect of photoselection by the linearly polarized excitation pulse indicates that a major contribution to the apparent geminate rebinding in the 50-ns relaxation arises from rotational diffusion of molecules containing unphotolyzed heme-CO complexes.
(3) This is due to the influence of the fluorine substituent(s) on the basicity of the amine function proximal to the fluoromethylene group, this effect being amplified by geminal disubstitution.
(4) Significant subnanosecond geminate recombination is observed in oxyhemoglobin down to 150 K, while below 100 K this geminate recombination disappears.
(5) In addition, the first prevalence statistics for the bilateral occurrence of fusion and gemination in the primary and permanent dentitions are determined.
(6) We discuss geminate recombination measurements of cyanomet hybrid hemoglobins with NO and consider these results in terms of alpha and beta subunit heterogeneity.
(7) The results were analyzed quantitatively in terms of a three-step reaction scheme, MbX in equilibrium B in equilibrium C in equilibrium Mb + X, where Mb is myoglobin, B represents a geminate state in which the ligand is present in the distal pocket but not covalently bound to the iron atom, and C, a state in which the ligand is still embedded in the protein but further away from the heme group.
(8) The picosecond geminate rebinding of molecular oxygen was monitored in a variety of different human, reptilian, and fish hemoglobins.
(9) Comparing the kinetic and thermodynamic process of the O2 geminate reaction among several Mbs, we concluded that the geminate O2 reaction with Mb is governed by the dynamic motion of the protein which is sensitively controlled by the static interaction of the heme moiety with the surroundings.
(10) The geminal nature of the magnitude-COSY detected partners to the resolved C beta H peaks is confirmed by strong NOESY cross-peaks.
(11) Typical geminate virus particles were observed in extracts of plants infected with ORF AC3 mutants indicating that this gene is not essential for coat protein synthesis or virus assembly but possibly acts by modulating virus levels in infected tissues.
(12) However, the rates of geminate recombination of NO and O2 and the affinity of myoglobin for O2 were dependent upon the basicity of residue 45.
(13) The vicinal (vic) isomer was excreted in a 2 times higher amount (16 nmol) than the geminal (gem) isomer (8 nmol).
(14) The fraction geminate signal was least at delays where the maximum proportion of liganded T state tetramer is expected.
(15) Geminate recombination phases were observed at 30 ns and 1 microsecond following photodissociation.
(16) It is suggested that all succedaneous teeth that are joined or fused together by dentin be referred to as fused teeth because of the frequent difficulty in differentiating fusion and gemination in the adult dentition.
(17) The geminal beta-methylene protons for the two cysteines bound to the iron(II) center were clearly identified, as well as the C alpha H and one C beta H for each of the cysteines bound to the iron(III).
(18) Measurement of the geminate process in the infrared CO-stretch bands shows distributed activation enthalpies with different distributions for each band, transitions between two bands that correspond to photolyzed ligands, and kinetic hole burning.
(19) The kinetics of geminate recombination for the diliganded species alpha 2CO beta 2 and alpha 2 beta 2CO of human hemoglobin were studied using flash photolysis.
(20) Flash photolysis kinetics of carbon monoxide hemoglobin show a decrease in the fraction of ligand recombination occurring as geminate when the hemoglobin has fewer ligands bound.
Twinning
Definition:
(p. pr. & vb. n.) of Twin
(n.) The assemblage of two or more crystals, or parts of crystals, in reversed position with reference to each other in accordance with some definite law; also, rarely, in artificial twinning (accomplished for example by pressure), the process by which this reversal is brought about.
Example Sentences:
(1) All the twins were born in years 1973-1987, the total number was 2,226 boys and 2,302 girls.
(2) Plasma renin activity (PRA) and aldosterone concentration were measured before and during submaximal exercise in 10 male monozygotic twin pairs who were discordant for smoking.
(3) Symmetrical cases (the so-called siamese twins) have an obvious predominance (92.3%).
(4) From the 32nd week on, the twins' mean weekly BPD increment decreased, this lesser growth rate being more marked than that of singletons.
(5) In the UK the twin threat of Ukip and the BNP tap into similar veins of discontent as their counterparts across the English channel.
(6) There it was found she was not carrying twins but her baby remained in hospital for some weeks with respiratory problems.
(7) Therefore, we conclude that monochorionic twins can be considered monozygotic.
(8) A planet with conditions that could support life orbits a twin neighbour of the sun visible to the naked eye, scientists have revealed.
(9) Presented is the case of a triplet pregnancy with conjoined twins diagnosed antenatally with sonography.
(10) This was either giant teratoma of placenta or malformed twin foetus.
(11) Blood samples were obtained from 18 twin pairs, and the major prostaglandin E2 (PGE2) plasma metabolite 15-keto-13,14-dihydro-PGE2 was measured by RIA after its conversion to 11-deoxy-15-keto-13,14-dihydro-11 beta,16 xi-cyclo-PGE2.
(12) Given his background, Boyle says, growing up in a council house near Bury, with his two sisters (one a twin) and his strict and hard-working parents (his mum worked as a dinner lady at his school), he should by rights have been a gritty social realist, but that tradition never appealed to him.
(13) The affected twin had classical loss of sc fat from her face, upper arms, and trunk as well as associated hypocomplementemia, microscopic hematuria, and a borderline oral glucose tolerance test without hyperinsulinism.
(14) Neuropsychological testing of the affected twin demonstrated marked deficits in all areas of cognitive function.
(15) Therefore, this study evaluates the validity of zygosity diagnosis based on examination of placental membranes, and at the same time evaluates Weinberg's differential rule in a Danish consecutive twin series.
(16) Having already seen off the Winklevoss twins who claimed he stole the idea for Facebook from them , Zuckerberg now faces a convicted fraudster who says he has a contract giving him 84% of the social network.
(17) These adjusted correlation coefficients in MZ twins are 0.5 for both K1 and K5 blood pressure.
(18) Significant intraclass coefficients were observed in MZ twins for the different expressions of RMR.
(19) However, after the exclusion of cases with congenital abnormality association of low birth weight newborn infants and with genital anomalies of the male, the twin birth rate was 1.8 per cent.
(20) The size of right and left middle phalanges in the II-V fingers and the III finger have been studied in 108 pairs of monozygotic and dizygotic twins at 8--19 years of age and in 60 paris (pedagogical experiment) of separated twins (from the same pair), schoolchildren of the 2d--5th forms trained according different programs of physical culture.