() A soft or porous stone formed by depositions from water, usually calcareous; -- called also calcareous tufa.
() A friable volcanic rock or conglomerate, formed of consolidated cinders, or scoria.
Example Sentences:
(1) A trend towards a higher G+C content in fusA (gene encoding elongation factor (EF)-G) and tufA (gene encoding EF-Tu) in S. typhimurium is noted.
(2) The combination of tufA(Aa) and a rpsD12 ribosomal mutation is lethal at room temperature and the double-mutant strain has an elevated temperature optimum (42 degrees C) for growth rate, translation rate and nonsense suppression.
(3) Furthermore, the tufA mutation enhances the cellular growth rate of the rpsL mutant, whereas it decreases growth of strains with normal ribosomes.
(4) Previous work suggested that the tufA gene, encoding protein synthesis elongation factor Tu, was transferred from the chloroplast to the nucleus within the green algal lineage giving rise to land plants.
(5) The observations that introduction of a tufA(+) region makes the resistant strain sensitive to the antibiotic and that transduction of tufB1 into a recipient other than E. coli D22 yields kirromycin-sensitive progeny support these conclusions.
(6) Potential ribosome binding sites are located 58 and 32 positions upstream of the tufA and ORF206 start codon, respectively.
(7) We have replaced the ribosomal binding site (RBS) of the lacZ gene of E. coli by those of the maturation (A) gene of phage MS2 and that of the tufA gene.
(8) By examining heteroduplexes between restriction endonuclease-generated fragments of DNA containing the tufA, fus, and tufB genes, we have demonstrated that the fus and tufA genes are intimately related physically in one of two possible arrangements.
(9) The proof for the presence of tufA gene in pTUAl is based on the following observations: (1) ability of pTUAl DNA and is EcoRI fragments to direct synthesis of EF-Tu in a cell-free protein synthesizing system; and (2) RNA .
(10) It thus became possible to study the consequences for growth of tufA inactivation by insertion of bacteriophage Mu.
(11) Genetic data suggest that pTu is the product of the tufA and tufB genes.
(12) Therefore, phenotypic expression of kirromycin resistance in vivo appears to be only possible if the EF-Tu mutant lacks an active tufA gene, a property likely to be inherited from the parental D22 strain.
(13) Facebook Twitter Pinterest Juvenile hart’s tongues, among mosses embedded in tufa.
(14) Sequence analysis revealed an ORF of 99 amino acids (including the N-terminal processed methionine) at a position 477 bp from the 3' end of tufA but on the opposite strand.
(15) We conclude the following: (a) The tufA and tufB messengers have different half lives (3.0 and 2.4 min, respectively).
(16) Filter hybridizations reveal a chloroplast tufA gene in all Ulvophyceae and Chlorophyceae and in some but not all Charophyceae.
(17) The G domain of elongation factor Tu (EF-Tu), representing the N-terminal half of the factor according to its three-dimensional model traced at high resolution, has been isolated by genetic manipulation of tufA and purified to homogeneity.
(18) The water is sharply alkaline, with a pH value of over nine, and thanks in part to the water's purity – no phosphates here – the formation of tufa continues on the Lathkill when it has ceased on most other rivers.
(19) The tufA gene, one of two genes in Escherichia coli encoding elongation factor Tu (EF-Tu), was cloned into a ColE1-derived plasmid downstream of the lac promoter-operator.
(20) A deletion mutant of a plasmid born Escherichia coli tufA gene, which codes for a truncated elongation factor Tu comprising domains 2 and 3, has been constructed by genetic engineering.
Tuft
Definition:
(n.) A collection of small, flexible, or soft things in a knot or bunch; a waving or bending and spreading cluster; as, a tuft of flowers or feathers.
(n.) A cluster; a clump; as, a tuft of plants.
(n.) A nobleman, or person of quality, especially in the English universities; -- so called from the tuft, or gold tassel, on the cap worn by them.
(v. t.) To separate into tufts.
(v. t.) To adorn with tufts or with a tuft.
(v. i.) To grow in, or form, a tuft or tufts.
Example Sentences:
(1) This observation provides corroboration for the identification of the principal CCK-I neuron in the rat olfactory bulb as the centrally projecting middle tufted cell.
(2) The observed damage was similar: a decrease of the total length of the dendritic segments of the apical tuft and the basal arborization.
(3) The cell density in the tufts was 120 and 70 per cent greater than controls in AGN and RPGN, respectively.
(4) Approximately one-fourth of the cells contained cytoplasmic fibrillar bodies and amorphous fibrous tufts around the nuclear envelope.
(5) Stereociliary tufts in the tectorial region differ from those in the free-standing region in several ways.
(6) Severe mesangial insudation of material containing fibrinogen derivatives resulted in segmental tuft necrosis with almost complete replacement and destruction of the mesangial matrix.
(7) The anaxonic granule cell of the olfactory bulb is believed to inhibit mitral and tufted cells through reciprocal dendrodendritic synapses.
(8) Detached ciliary tufts (DCTs) have been observed in sputum, in cervicovaginal smears and, rarely, in fluid from the pouch of Douglas.
(9) Among the 58 Helicobacter-negative cases, similar changes were not observed in the ulcer edges, except for two cases which exhibited some cellular tufts.
(10) Monocytes were the predominant cell type among stained cells in glomerular tufts and crescents.
(11) At least six different cell types are recognizable: (1) nondifferentiated duct cells; (2) cells containing apical secretory granules; (3) goblet cells; the mucosubstances of type 2 and 3 are PAS- and Alcian-blue-positive, also reacting wih methenamine silver; (4) ciliated cells, containing a single cilium with the microtubular pattern 9+2; (5) tuft cells with extremely long and wide microvilli and a pear-shaped cell body; (6) migrating cells, mainly lymphocytes and some assumed eosinophils, showing reaction to Mg++-activated ATPase.
(12) The Tufts Assessment of Motor Performance (TAMP) was administered to 69 children (ages 6-18 years, X = 12.1, SD = 3.9) and 137 adults (ages 19-83 years, X = 46.7, SD = 20.0) with neurological and musculoskeletal impairments.
(13) The funniest hairstyle I’ve ever had The time I tried to give myself a touch-up with clippers and shaved out a whole tuft of hair.
(14) Surface areas of tufts and crescents were separately determined by photographing glomeruli, projecting and tracing outlines of tufts and crescents, and cutting out and weighing the tracings.
(15) S. sanguis I strains adhered better than S. sanguis II strains and peritrichously fibrillar strains generally adhered better than tufted strains.
(16) An adhesion is considered as a nidus for segmental sclerosis; as the adhesion progresses, the related tuft regions turn into sclerosis.
(17) The terminal tuft of the distal phalanx is destroyed by pressure erosion.
(18) That's probably why Tufts has reneged on its agreement with the government on how it plans to deal with sexual assault on campus – administrators know it's unlikely that they'll have their funding pulled as a result of their non-compliance.
(19) They found, in the articulation of the upper limbs, in addition to generic signs of arthrosis, zones of bone reabsorption (vacuoles), especially as regard the wrist and hands, and irregularities of the tufts.
(20) Several stages of collagen assemblies were observed: intracellular packing of SLS-like aggregates surrounded by membrane containing areas with a clathrin coat; fine non cross-striated filaments connecting the cell membrane at 1 pole of the cells and collagen fibrils; tufts of filaments directly linked to collagen fibrils.