(n.) A resinous substance produced mainly on the banyan tree, but to some extent on other trees, by the Coccus lacca, a scale-shaped insect, the female of which fixes herself on the bark, and exudes from the margin of her body this resinous substance.
Example Sentences:
(1) Fifty-six percent of Lac+ transconjugants were resistant to the S. cremoris M12R lytic phage.
(2) We have previously shown that about 90% of total Escherichia coli lac repressor synthesized in mammalian cells is located in the cytoplasm [Hu and Davidson, Cell 48 (1987) 555-566].
(3) Hfr strains B4 and B8 transfer the Escherichia coli chromosome in opposite directions, each transferring lac(+) as the last known marker.
(4) Combined with histological analysis, these results suggest a more rapid recovery of normal spermatogenesis after physical insult with LAC treatment.
(5) The F'lac+ episome of Escherichia coli origin was transferred by conjugation with frequencies of 10(-7) to 10(-5) from Erwinia amylovora to 14 out of 15 Salmonella typhimurium trp female parents.
(6) A protein identical in properties to FIII L. casei lac was isolated from clones of E. coli carrying this DNA insert.
(7) Only one monoclonal antibody strongly inhibited cAMP binding by CRP, and this was accompanied by a consequent strong inhibition of both lac DNA binding and abortive initiation by RNA polymerase.
(8) These ends were cloned separately in lambdapMu hybrid particles that derived from a single Mu lysogen in the lac Z part of lambdaplac5.
(9) The structure of F13, a plasmid containing lac, purE, and proC, has been determined by heteroduplex analysis.
(10) In this case, resistance markers were lost when the transductants became Lac- but the derivatives remained copper resistant.
(11) Circular dichroic studies and hydropathy profiling of the amino-acid sequence of this 'lac' permease suggest a secondary structure in which the polypeptide consists of 12 hydrophobic segments in alpha-helical conformation that traverse the membrane in zig-zag fashion connected by shorter, hydrophilic domains with most of the charged residues and many of the residues commonly found in beta-turns.
(12) The strength of the STII gene promoter was compared with that of the ompF and lac operons, which were similarly fused to the lacZ gene.
(13) From the results of potassium iodide quenching of fluorescence from the tryptophans, and from attempts to react the native lac repressor with dimethyl(2-hydroxy-5-nitrobenzyl) sulfonium bromide and 2-hydroxy-5-nitrobenzyl bromide, we propose that tryptophan residue 209 is involved in a conformational change of the protein upon binding of inducer, but does not come in direct contact with inducer.
(14) In cells growing with interdivision times of 27, 36, and 55 min, the F'lac replicated at various stages in the division cycle but always at approximately the same time as initiation of chromosome replication.
(15) Expression of the blood group carbohydrates was similar in follicular and radicular cysts but differed from that seen in odontogenic keratocysts by the failure to detect N-lac in the latter.
(16) The phage lambda operator OR1 and a 18 base pair symmetric lac operator have been studied by high resolution NMR.
(17) Deletions covering all or part of the transfer region, as well as of lac and of pif, were obtained in the course of this analysis.
(18) A Mud(Ap, lac) prophage has been shown to be inserted into the ptsH gene of E. coli.
(19) From transient expression studies of the fusion gene between the chloramphenicol acetyltransferase and lac genes, it was found that the lacCAP binding site could act as an enhancer activity on the SV40 promoter, and also as an additive enhancer activity to the SV40 enhancer in HeLa cells.
(20) Expression of chlD-lac was increased in cells grown with nitrate.
Lat
Definition:
(v. t.) To let; to allow.
Example Sentences:
(1) LATS was measured with the double isotope technique in IgG serum concentrates of 23 patients with Graves' disease before treatment and of 18 patients during treatment with carbimazole and triiodothyronine.
(2) More importantly, this study reports the first detection of LAT in RNA extracted from 9% of corneas from latently infected rabbits (n = 22) by the polymerase chain reaction.
(3) Conversely, MS patients, especially those in AF, appear to be at high risk of harboring an LAT.
(4) Out of 50 consecutive untreated patients with diffuse toxic goitre 15 showed long-acting thyroid stimulator (LATS), 30 showed LATS protector only, and five showed neither.
(5) VO2max and lactate threshold workload (LaT) of six subjects were assessed on a Monark ergometer.
(6) The number of herpes simplex virus (HSV) genome equivalents recovered from latently infected mouse spinal ganglia was compared with the proportion of neurons containing latency-associated transcripts (LATs).
(7) The serum levels of LATS and thyroid hormones were high.
(8) latex agglutination test (LAT), two indirect hemagglutination tests (IHAT) (Carter-Wallace, USA and Ismunit, Italy), enzyme immunoassay (EIA) and indirect fluorescent antibody test (IFAT).
(9) Using herpes simplex viruses deleted and restored for the latency-associated transcripts (LATs), we have quantitatively assessed the role of the transcripts in establishment and maintenance of latent infection.
(10) These results indicate that HSV-1 LAT expression is not an absolute requirement for establishment of the latent state.
(11) The cAMP-PDE activity in the thyroid significantly increased in both the LATS and TSH groups, but the cGMP-PDE activity was unchanged.
(12) Furthermore, LAT effectively inhibits transactivation of gene expression by infected-cell polypeptide 0 in transient transfection assays.
(13) We evaluated two LATs (Accu-Staph; Carr-Scarborough, Decatur, Ga.; Staphaurex; Wellcome, Dartford, England) with particular emphasis on their ability to correctly identify oxacillin-resistant S. aureus.
(14) There is strong evidence in favour of the hypothesis that lat molecules function as components of the T receptor for self Ia proteins in a I-restricted manner.
(15) Actually, positive rate in LAT was higher than that in DP among clinical specimens in which M. pneumoniae was detected by culture method.
(16) When 3-5 volumes of 0.5% Rivanol solution were mixed to serum containing TSH or LATS activity, LATS activity remained mainly with IgG in the supernatant fraction.
(17) All of these features of the LATs in humans are consistent with those reported in rabbits and mice and further validate the animal models of human HSV-1 infection.
(18) The long-acting thyroid stimulator (LATS) has been thought to be responsible for the hyperthyroidism of Graves's disease.
(19) Demonstration of LATS in the serum, slightly increased serum-triiodothyronine-levels, failure of normal response to TRH and an abnormal triiodothyronine-suppression test in euthyroid ophthalmopathy may herald the manifestation of hyperthyroidism at some later time.
(20) Most patients have elevated levels of LATS in their serum; however, this appears to be a marker for the disease, rather than a cause.