() 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.
Tuff
Definition:
(n.) Same as Tufa.
Example Sentences:
(1) At Bandelier national monument , tucked deep inside Frijoles Canyon, ancient Puebloan people used hand tools to shape natural caves in the tuff into shelters known as cavates.
(2) Isotopic determinations on a tuff below the fossiliferous horizon gives dates of 4.96 my and 5.25 my.
(3) While talking an assailant into surrendering may not always be an option, the fact that Tuff successfully did so is a testament to the fact that violence does not always have to be the first answer and that tragic situations can be resolved without the use of force.
(4) Antoinette Tuff, a school clerk at the Ronald E McNair Discovery Learning Academy in Decatur, Georgia, saw 20-year-old Brandon Michael Hill enter the school with an assault rifle and several other weapons.
(5) Photograph: Dan Tuffs for the Guardian We had a really nice house and fields of tomatoes [in Mexico] but it was so unsafe Luis Galvan Galvan’s Daca permission expires next year.
(6) I think cars have an extraordinary opportunity for cool design.” Wheego A US company that was spun out of Ruff & Tuff Electric Vehicles, a manufacturer of recreational electric vehicles such as golf carts.
(7) The white cliffs, hoodoos and slot canyon are all made of of volcanic tuff that erupted around a million years ago.
(8) The hominid tracks in Tuff 7 at Site G in the Garusi River Valley demonstrate bipedality at a mid-Pliocene datum.
(9) Bimesaraic arteriography may show typical images where extravasation of contrast medium is associated with vascular tuft or "tuff".
(10) Over time, this ash layer solidified into a soft, easily eroded, whitish rock called tuff.
(11) Around 30m years ago, rhinos, camels, giant ground sloths and saber-toothed cats roamed a lush grassland before being buried by a series of volcanic eruptions, which preserved their bones in colourful layers of tuff.
(12) Instead of resorting to violence, the school implemented its evacuation procedures and Tuff engaged Hill in a conversation .
(13) Antoinette Tuff showed us it can be done another way, and we need to follow her lead.
(14) Ultrastructurally 4 basic types of inclusion bodies in Schwann cells could be demonstrated (pleo-morphic "zebra body"-like inclusions, double-lamellated inclusions, "tuff-stone"-like inclusions, granular osmiophilic inclusions).
(15) Epidemiological and environmental surveys in the Cappadocian region of Turkey have linked the high incidence of pleural and peritoneal mesothelioma in the occupants of some villages with the zeolite fibres released from the locally occurring volcanic tuff.
(16) Photograph: Dan Tuffs for the Guardian In the midst of a prolonged drought, vegetable and fruit growers are angry that rivers are allowed to carry more of their water out to sea to help preserve an endangered fish, the delta smelt, while water for irrigation is in effect rationed.
(17) Photograph: Dan Tuffs for the Guardian If Galvan is afraid of being forced out of the country, Jenny Beard is fearful of staying.
(18) Photograph: Dan Tuffs for the Guardian Luis Galvan gets why a lot of people in Porterville voted for Trump even if he thinks they are mistaken.
(19) Photograph: Dan Tuffs for the Guardian Beard complained and the co-worker was reprimanded.
(20) Photograph: Dan Tuffs for the Guardian Maddox and Galvan live in Porterville, a small, conservative city nestled under the Sierra Nevada mountains, far from the prosperity and glamour of California’s coast.