(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.
Lag
Definition:
(a.) Coming tardily after or behind; slow; tardy.
(a.) Last; long-delayed; -- obsolete, except in the phrase lag end.
(a.) Last made; hence, made of refuse; inferior.
(n.) One who lags; that which comes in last.
(n.) The fag-end; the rump; hence, the lowest class.
(n.) The amount of retardation of anything, as of a valve in a steam engine, in opening or closing.
(n.) A stave of a cask, drum, etc.; especially (Mach.), one of the narrow boards or staves forming the covering of a cylindrical object, as a boiler, or the cylinder of a carding machine or a steam engine.
(n.) See Graylag.
(v. i.) To walk or more slowly; to stay or fall behind; to linger or loiter.
(v. t.) To cause to lag; to slacken.
(v. t.) To cover, as the cylinder of a steam engine, with lags. See Lag, n., 4.
(n.) One transported for a crime.
(v. t.) To transport for crime.
Example Sentences:
(1) At the moment we are, if anything, slightly lagging."
(2) Initiation of the alternative pathway by the cryptococcal capsule is characterized by a lag in C3 accumulation and the appearance of a limited number of focal initiation sites which resemble those observed when the alternative pathway is activated by zymosan and nonencapsulated cryptococci.
(3) When cultures were pulse labeled for 15 min and then incubated under chase conditions for 105 min, the amount of degraded collagen attained a value equal to approximately 20% of the amount synthesized during the labeling period; the data were fit with a simple exponential function that had a 40-min rise time and a 12-min lag time.
(4) It is conceivable that DNA replication of RSF1010 does not need the priming mechanism for lagging strand synthesis and proceeds by the strand displacement mechanism.
(5) Supplementation of neuraminidase-treated Lp(a) with N-acetylneuraminic acid (NANA) at concentrations comparable to the naturally occurring amounts of NANA in the Lp(a) protein moiety led to an increase of the lag-phase yielding values which were comparable to those observed with native Lp(a).
(6) A more specific differentiation, as indicated by the sharp increase in GAD levels which was concurrent with an increase in interneuronal contacts, lagged behind the initial growth.
(7) It appears that the decline in plasma IGF-I lags considerably behind the sharp fall in plasma GH levels and expression of hepatic IGF-I mRNA.
(8) This causes a time lag, with money continuing to be taken until the SLC is made aware that the debt has been settled.
(9) The drug-induced effect changes lagged behind the plasma drug level changes.
(10) The first transient increase in conductance developed with very short time lag (2-10 s) after serum addition, while the period between successive transients was 30-90 s, being remarkably constant in each particular cell.
(11) The Bank of Spain estimates that GDP grew 0.1% in the first quarter of this year, ending seven consecutive quarters of contraction but lagging the rest of the euro area's recovery by six months.
(12) Lysine was unique in accelerating gluconeogenesis beyond the lag period.
(13) This pattern is still 2 months off from the actual birth distribution; however, the retrospective data probably underestimate the real pregnancy lag.
(14) For example, after imported mouse dihydrofolate reductase (a soluble monomeric enzyme) had been released from mhsp70, folding to a protease resistant conformation occurred only after a lag and was much slower than the release.
(15) The company lagged "far behind its major competitors, with zero reporting of its energy or environmental footprint to any source or stakeholder", the report said.
(16) The temporal lag varied inversely with the dose and was more pronounced with HA.
(17) This multistage schema would account for the lag between injury and restenosis and the failure of chronic antithrombotic therapy to prevent this process.
(18) The results are interpreted as follows: bleomycin induces chromosomal aberrations that in turn give rise to micronuclei by means of lagging chromatin, main and micronuclei eventually become asynchronous in their cell cycles and mitosing main nuclei induce PCC in the micronuclei.
(19) Furthermore, the rate of superoxide generation decreased after a prolonged lag period.
(20) The hypothesis that a measure of intellectual speed assessed at one point in time would predict intellectual achievement at a later point in time was evaluated with a time-lagged cross-correlational analysis, an application of causal modeling techniques.