(prep.) Abreast; opposite to; facing; towards; as, against the mouth of a river; -- in this sense often preceded by over.
(prep.) From an opposite direction so as to strike or come in contact with; in contact with; upon; as, hail beats against the roof.
(prep.) In opposition to, whether the opposition is of sentiment or of action; on the other side; counter to; in contrariety to; hence, adverse to; as, against reason; against law; to run a race against time.
(prep.) By of before the time that; in preparation for; so as to be ready for the time when.
Example Sentences:
Upstream
Definition:
(adv.) Toward the higher part of a stream; against the current.
Example Sentences:
(1) The latter result indicates that the dexamethasone block is upstream from release of esterified arachidonic acid.
(2) Other DNase I hypersensitive sites located adjacent to the S14 cap site at -65 to -265 base pairs (Hss-1) or upstream at -1.3 kb (Hss-2), -2.1 kb (Hss-3'), -5.3 kb (Hss-4), and -6.2 kb (Hss-5) remained unaffected by changes in S14 gene transcription.
(3) No other essential regulatory sequence is located further upstream.
(4) Analysis of glutamate dehydrogenase (GDH) expression by enzyme assay and immunoblots, as well as Northern and dot blots of poly (A)+ RNA, in the deletion strains indicates that there are two upstream regulatory sequences that control the level of gene expression.
(5) Although the islet promoter was found to lack a TATA box, a major transcript from the islet promoter was mapped 486 nucleotides upstream of the translation initiation site.
(6) If this is the only issue, flight would be fine, but need to make sure that it isn’t symptomatic of a more significant upstream root cause.” Elon Musk (@elonmusk) Btw, 99% likely to be fine (closed loop TVC wd overcome error), but that 1% chance isn't worth rolling the dice.
(7) There was an upstream "HTF" island (Hpa II tiny fragments) followed by four direct repeats of the "chorion box" enhancer.
(8) Six discrete 'phased' nucleosomes are present upstream from the gene and are modulated by induction.
(9) That the opposite was observed in our study indicates that the increase in Pst(L), which results from parenchymal hysteresis, offsets any dimensional decrease in upstream airways due to airways hysteresis.
(10) The human gene-specific upstream stimulatory transcription factor (USF) is required, both in vivo and in vitro, for maximal expression of the major late promoter (MLP) of adenovirus.
(11) A single upstream CCAAT element is essential for high level expression in both liver and non-liver cells.
(12) Deletional analysis demonstrated that a region between -86 and -70 nucleotides upstream from the transcriptional origin of the human VIP gene was responsible for stimulation by forskolin.
(13) The gradient of increasing copper and zinc concentrations with increasing distance upstream from the mouth of the estuary reported in 1975 could not be statistically validated.
(14) By using primer 1 (5'-AAAGAATTCATGGAATCCAGGATCTG-3', upstream nucleotides 157 to 2877), primer 2 (5'-AAAGAATTCATGAACGTGAAGGAATCG-3', upstream nucleotides 1846 to 2877), and primer 4(5'-ATAAAGCTTAATCAGACGTTCTCTTCTTC-3', downstream nucleotides 157 to 2877 and 1846 to 2877), the HCMV B gene code region sequence and its glycoprotein 52 kd antigenic domain sequence were amplified from the recombinant plasmid pBH1 DNA containing the HCMV B gene.
(15) The sequence TAGAAAA was found 30 bases upstream from the transcription initiation site and could be analogous to the TATA box.
(16) A potential ribosome binding site was located 20 nucleotides upstream of the initiation codon in the 5' noncoding region.
(17) A 1,300-base pair fragment of 5'-flanking sequence containing these elements, ligated upstream from a firefly luciferase reporter gene and transfected into cultured normal rat kidney cells, demonstrated strong promoter activity.
(18) Since these three mutants differ in the extent to which EBNA expression is impaired, the data suggest that there are several critical regions upstream of the open reading frame that regulate EBNA expression in COS-1 cells.
(19) One class II mutant carried a Tn10 insertion in or close to malT whereas in the remaining class II mutants the insertions were located at least 4 kb upstream of pulA in a region which may define a new regulatory locus of the maltose operon.
(20) We report here that a nuclear protein is tightly bound to the HBV genome at a position approximately 190 bases upstream from the S gene promoter.